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廣瀬 和之

ヒロセ カズユキ  (Kazuyuki Hirose)

基本情報

所属
国立研究開発法人宇宙航空研究開発機構 宇宙科学研究所 特任教授
学位
工学博士(早稲田大学)
工学修士
J-GLOBAL ID
200901096979972445
researchmap会員ID
1000192906

研究キーワード

 4

研究分野

 2

学歴

 2

委員歴

 14
もっとみる

受賞

 6
もっとみる

論文

 57
  • Shusaku KANAYA, Hideyuki FUKE, Yu MIYAZAWA, Hiroyuki TOYOTA, Kazuyuki HIROSE, Ryoto FUNAYAMA, Masashi IKEGAMI
    Journal of Evolving Space Activities 1 2024年4月  査読有り
  • Hideyuki FUKE, Shusaku KANAYA, Yu MIYAZAWA, Hiroyuki TOYOTA, Kazuyuki HIROSE, Ryoto FUNAYAMA, Masashi IKEGAMI
    Journal of Evolving Space Activities 1 2023年12月  査読有り
  • Daisuke Kobayashi, Masashi Uematsu, Kazuyuki Hirose
    IEEE Transactions on Nuclear Science 1-1 2023年  
  • K. Watanabe, T. Shimada, K. Hirose, H. Shindo, D. Kobayashi, T. Tanigawa, S. Ikeda, T. Shinada, H. Koike, T. Endoh, T. Makino, T. Ohshima
    2022 IEEE International Reliability Physics Symposium (IRPS) 2022年3月27日  
  • Yu Miyazawa, Gyu Min Kim, Ayumi Ishii, Masashi Ikegami, Tsutomu Miyasaka, Yudai Suzuki, Tomoyuki Yamamoto, Takeshi Ohshima, Shusaku Kanaya, Hiroyuki Toyota, Kazuyuki Hirose
    The Journal of Physical Chemistry C 125(24) 13131-13137 2021年6月24日  
  • Daisuke Kobayashi, Kazuyuki Hirose, Keita Sakamoto, Yuta Tsuchiya, Shogo Okamoto, Shunsuke Baba, Hiroyuki Shindou, Osamu Kawasaki, Takahiro Makino, Takeshi Ohshima
    IEEE Transactions on Nuclear Science 1-1 2021年  
  • K. Sakamoto, M. Kusano, T. Narita, S. Ishii, K. Hirose, S. Baba, D. Kobayashi, S. Okamoto, H. Shindou, O. Kawasaki, T. Makino, Y. Mori, D. Matuura
    IEEE Transactions on Nuclear Science 651 2021年  査読有り
  • Hiroaki Itsuji, Daisuke Kobayashi, Kazuyuki Hirose
    Japanese Journal of Applied Physics 59(10) 106501-106501 2020年10月1日  
  • T. Makino, S. Onoda, T. Ohshima, D. Kobayashi, H. Ikeda, K. Hirose
    Quantum Beam Science, 4 15-1-15-9 2020年3月  査読有り最終著者
  • Daisuke Kobayashi, Kazuyuki Hirose, Keita Sakamoto, Shogo Okamoto, Shunsuke Baba, Hiroyuki Shindou, Osamu Kawasaki, Takahiro Makino, Takeshi Ohshima, Yoshiharu Mori, Daisuke Matsuura, Masaki Kusano, Takanori Narita, Shigeru Ishii
    IEEE Transactions on Nuclear Science 67(1) 328-335 2020年1月  
  • Shusaku Kanaya, Gyu Min Kim, Masashi Ikegami, Tsutomu Miyasaka, Kohtaku Suzuki, Yu Miyazawa, Hiroyuki Toyota, Kanta Osonoe, Tomoyuki Yamamoto, Kazuyuki Hirose
    The Journal of Physical Chemistry Letters 10(22) 6990-6995 2019年11月21日  
  • C-H. Chung, D. Kobayashi, K. Hirose
    IEEE Transactions on Device and Materials Reliability 19(4) 751-756 2019年11月  査読有り最終著者
  • D. Kobayashi, N. Hayashi, K. Hirose, Y. Kakehashi, O. Kawasaki, T. Makino, T. Ohshima, D. Matsuura, Y. Mori, M. Kusano, T. Narita, S. Ishii, K. Masukawa
    IEEE Transactions on Nuclear Science 66(1) 155-162 2019年11月  査読有り
  • C-H. Chung, D. Kobayashi, K. Hirose
    IEEE Transactions on Device and Materials Reliability 18(4) 574-582 2018年12月  査読有り最終著者
  • Jérémy Barbé, Harrison K.H. Lee, Hiroyuki Toyota, Kazuyuki Hirose, Shin Ichiro Sato, Takeshi Ohshima, Keith C. Heasman, Wing C. Tsoi
    Applied Physics Letters 113(18) 2018年10月29日  査読有り
    © 2018 Author(s). Organic solar cells have attractive potential for space applications as they have very high specific power (power generated per weight) and ultra-high flexibility (to reduce stowed volume). However, one critical issue is whether they are stable under the harsh space environment, particularly their stability under high energy, high flux, electron and proton bombardment. In this paper, the stability of benchmark organic photovoltaic layers under proton bombardment (150 keV with a fluence of 1 × 1012/cm2) and electron bombardment (1 MeV with a fluence of 1 × 1013/cm2) under vacuum is investigated. Raman spectroscopy, photoluminescence spectroscopy, and optical reflectance spectroscopy are applied to study their chemical/structural, photo-chemical/morphological, and optical stability after the bombardments. The results show that all the benchmark organic photovoltaic films are stable under the radiation, implying that organic solar cells could be feasible for space applications.
  • Takashi Kato, Takashi Yamazaki, Kazunori Maruyama, Takeshi Soeda, Hiroaki Itsuji, Daisuke Kobayashi, Kazuyuki Hirose, Hideya Matsuyama
    IEEE Transactions on Nuclear Science 65(8) 1900-1907 2018年8月  
  • Yu Miyazawa, Masashi Ikegami, Hsin-Wei Chen, Takeshi Ohshima, Mitsuru Imaizumi, Kazuyuki Hirose, Tsutomu Miyasaka
    ISCIENCE 2 148-+ 2018年4月  
    Materials to be used in the space environment have to withstand extreme conditions, particularly with respect to cosmic particle irradiation. We report robust stability and high tolerance of organolead trihalide perovskite solar cells against high-fluence electron and proton beams. We found that methylammonium and formamidinium-based lead iodide perovskite solar cells composed of TiO2 and a conductive polymer, as electron and hole transport materials, can survive against accumulated dose levels up to 10(16) and 10(15) particles/cm(2) of electrons (1MeV) and protons (50 KeV), respectively, which are known to completely destroy crystalline Si-, GaAS-, and InGaP/GaAs-based solar cells in spacecraft. These results justify the superior tolerance of perovskite photovoltaic materials to severe space radiations and their usefulness in satellite missions.
  • 高橋忠幸他, h author
    Journal of Astronomical Telescopes, Instruments, and Systems 4(2) 021402-1-021402-13 2018年4月  査読有り
  • Kikou Yamaguchi, Daisuke Kobayashi, Tomoyuki Yamamoto, Kazuyuki Hirose
    Physica B: Condensed Matter 532 99-102 2018年3月1日  査読有り
    The breakdown electric field of several SiC polymorphs has been investigated theoretically using a concept of “recovery rate,” which is obtained by first principles calculations. A good relationship between the experimental breakdown electric fields and the calculated recovery rate of 4H-, 6H-, and 3C-SiC was obtained. In order to examine the stability of SiC polymorphs, the total electronic energies of various types of SiC crystal structures were calculated. Here, two candidates of polymorphs—GeS-type- and 2H-SiC—with energies comparable to those of experimentally well-established structures, have been obtained. The breakdown electric fields of these two polymorphs were estimated using a relationship obtained from the results of 4H-, 6H-, and 3C-SiC. This indicates that one of these polymorphs, GeS-type-SiC, has higher breakdown electric field than any other SiC polymorphs. In addition to the investigation with the recovery rate, relationship between experimental breakdown electric field and calculated band gap with recently developed accurate electron-correlation potential has been also discussed.
  • Hiroaki Itsuji, Daisuke Kobayashi, Osamu Kawasaki, Daisuke Matsuura, Takanori Narita, Masahiro Kato, Shigeru Ishii, Kazunori Masukawa, Kazuyuki Hirose
    IEEE Transactions on Nuclear Science 65(1) 346-353 2018年1月1日  査読有り
    An interesting multiple-cell upset (MCU) phenomenon in silicon-on-insulator (SOI) static random access memorys (SRAMs) featuring long lines of more than ten flipped cells is studied. Such an abnormal MCU phenomenon was recently observed for back-biased SOI SRAMs in a heavy-ion test. Using a two-photon absorption-based laser system, we performed fixed-point observations and visualized the development of long line-type MCUs with increasing back bias. The visualization results provided insights to elucidate the mechanism behind these phenomena. Furthermore, using fixed-point observations, we extracted the length of MCUs for various bias conditions and laser strike positions. It was found that for all cases studied, the line length could be explained using an analytical model.
  • Daisuke Kobayashi, Kazuyuki Hirose, Taichi Ito, Yuya Kakehashi, Osamu Kawasaki, Takahiro Makino, Takeshi Ohshima, Daisuke Matsuura, Takanori Narita, Masahiro Kato, Shigeru Ishii, Kazunori Masukawa
    IEEE Transactions on Nuclear Science 65(1) 523-532 2018年1月1日  査読有り
    Silicon-on-insulator technology is often used to develop high-reliability devices with low sensitivity to single-event upsets or soft errors. Its key component, the buried-oxide (BOX) layer, is now thinned down to 10 nm. This thinning enables transistors on the layer to be efficiently conditioned by back-bias voltages fed underneath the layer. However, a little is known about the influence of such conditioning on the sensitivity to soft errors caused by heavy ion radiation. A static random access memory supported by a 10-nm-thick BOX layer was exposed to high-energy heavy ions. Back-bias voltages were fed to the memory cells through a triple well structure fabricated underneath the BOX layer. The applied back-bias conditioning led to a 100-fold increase in the soft-error sensitivity compared with the counterpart zero-bias condition. In addition, interesting line patterns of the upset cells were revealed on the memory floor. These findings are contrary to previous results in neutron and alpha-particle tests. Analyses and modeling as well as supplementary gamma-ray total ionizing dose tests suggest that they are caused by a new soft-error mechanism. Back-bias conditioning may increase perturbations in potential under the BOX layer, which are originally induced by respective single heavy-ion strikes. Each perturbation may spread under the layer and cause multiple cells on the layer to be upset via the capacitance coupling principle.
  • Daisuke Kobayashi, Kazuyuki Hirose, Takahiro Makino, Shinobu Onoda, Takeshi Ohshima, Shoji Ikeda, Hideo Sato, Eli Christopher Inocencio Enobio, Tetsuo Endoh, Hideo Ohno
    JAPANESE JOURNAL OF APPLIED PHYSICS 56(8) 2017年8月  
    The influences of various types of high-energy heavy-ion radiation on 10-nm-scale CoFeB-MgO magnetic tunnel junctions with a perpendicular easy axis have been investigated. In addition to possible latent damage, which has already been pointed out in previous studies, high-energy heavy-ion bombardments demonstrated that the magnetic tunnel junctions may exhibit clear flips between their high-and low-resistance states designed for a digital bit 1 or 0. It was also demonstrated that flipped magnetic tunnel junctions still may provide proper memory functions such as read, write, and hold capabilities. These two findings proved that high-energy heavy ions can produce recoverable bit flips in magnetic tunnel junctions, i.e., soft errors. Data analyses suggested that the resistance flips stem from magnetization reversals of the ferromagnetic layers and that each of them is caused by a single strike of heavy ions. It was concurrently found that an ion strike does not always result in a flip, suggesting a stochastic process behind the flip. Experimental data also showed that the flip phenomenon is dependent on the device and heavy-ion characteristics. Among them, the diameter of the device and the linear energy transfer of the heavy ions were revealed as the key parameters. From their dependences, the physical mechanism behind the flip was discussed. It is likely that a 10-nm-scale ferromagnetic disk loses its magnetization due to a local temperature increase induced by a single strike of heavy ions; this demagnetization is followed by a cooling period associated with a possible stochastic recovery process. On the basis of this hypothesis, a simple analytical model was developed, and it was found that the model accounts for the results reasonably well. This model also predicted that magnetic tunnel junctions provide sufficiently high soft-error reliability for use in space, highlighting their advantage over their counterpart conventional semiconductor memories. (C) 2017 The Japan Society of Applied Physics
  • Yuzuru Narita, Yutaka Takahashi, Masahide Harada, Kenichi Oikawa, Daisuke Kobayashi, Kazuyuki Hirose, Hideo Sato, Shoji Ikeda, Tetsuo Endoh, Hideo Ohno
    JAPANESE JOURNAL OF APPLIED PHYSICS 56(8) 2017年8月  査読有り
    This work represents the first-ever investigation of the effects of fast neutron exposure on the perpendicular-anisotropy CoFeB-MgO magnetic tunnel junctions (p-MTJs) with practical junction diameters (D) between 46 and 64 nm. In this study, 461 p-MTJs, each with a tunnel magnetoresistance (TMR) ratio above 90%, were irradiated with fast neutrons at a total 1 MeV equivalent fluence of 3.79 x 10(12)cm(-2), corresponding to 1.90 x 10(11) h irradiation with fast atmospheric neutrons (20cm(-2) h(-1)), without applying a bias voltage. Following irradiation, there were no changes in the properties of these devices, such as their resistance versus magnetic field curves, resistance values in the parallel and anti-parallel states, or TMR ratios, regardless of the neutron fluence. On the basis of these data, the nuclear reactions that occur under the specific experimental neutron irradiation conditions employed in this work are discussed. (C) 2017 The Japan Society of Applied Physics
  • Hiroaki Itsuji, Daisuke Kobayashi, Nelson E. Lourenco, Kazuyuki Hirose
    JAPANESE JOURNAL OF APPLIED PHYSICS 56(4) 2017年4月  査読有り
    Studied is the soft error issue, which is a circuit malfunction caused by ion-radiation-induced noise currents. We have developed a laser-based soft-error simulation system to emulate the noise and evaluate its reproducibility in the time domain. It is found that this system, which utilizes a two-photon absorption process, can reproduce the shape of ion-induced transient currents, which are assumed to be induced from neutrons at the ground level. A technique used to extract the initial carrier structure inside the device is also presented. (C) 2017 The Japan Society of Applied Physics
  • Keisuke Motoki, Yu Miyazawa, Daisuke Kobayashi, Masashi Ikegami, Tsutomu Miyasaka, Tomoyuki Yamamoto, Kazuyuki Hirose
    JOURNAL OF APPLIED PHYSICS 121(8) 085501 2017年2月  査読有り
    The effects of soft X-ray exposure on structures of CH3NH3PbI3 perovskite were investigated using an X-ray photoelectron spectroscopy (XPS) time-dependent measurement method. A crystalline sample was fabricated with the inverse-temperature crystallization method. The time evolutions of the core-level and valence-band spectra were recorded to determine the compositional ratios and valence band electronic structure of the sample, respectively. In addition, first-principles calculations were conducted to evaluate the valence band XPS spectra. The in situ XPS analysis combined with theoretical calculations demonstrated a degradation of the surface of CH3NH3PbI3 perovskite into PbI2 owing to the evaporation of methylammonium iodide.
  • Daisuke Kobayashi, Kazuyuki Hirose, Taichi Ito, Yuya Kakehashi, Osamu Kawasaki, Takahiro Makino, Takeshi Ohshima, Daisuke Matsuura, Takanori Narita, Masahiro Kato, Kazunori Masukawa
    2017 IEEE INTERNATIONAL RELIABILITY PHYSICS SYMPOSIUM (IRPS) 2017年  査読有り
    Silicon-on-insulator (SOI) SRAMs supported by a thin buried-oxide (BOX) film have been exposed to wide-range high-energy heavy ions for simulating terrestrial and galactic radiation impacts. Experimental results have demonstrated that a back-bias approach leads to a 100-times increase in their soft-error sensitivity compared to the counterpart zero-bias situation. This is attributed to that back biasing may enhance radiation-induced potential fluctuation under BOX, which may spread and cause multi-cell errors in the top SOI circuits via the capacitance coupling principle.
  • Nelson E. Lourenco, Zachary E. Fleetwood, Adrian Ildefonso, Mason T. Wachter, Nicolas J. -H. Roche, Ani Khachatrian, Dale McMorrow, Stephen P. Buchner, Jeffrey H. Warner, Hiroaki Itsuji, Daisuke Kobayashi, Kazuyuki Hirose, Pauline Paki, Ashok Raman, John D. Cressler
    IEEE TRANSACTIONS ON NUCLEAR SCIENCE 64(1) 406-414 2017年1月  査読有り
    The impact of semiconductor process scaling on the overall transient response of SiGe BiCMOS platforms is investigated. Pulsed-laser two-photon absorption (TPA) and heavyion broad-beam testing of SiGe HBT device and digital test structures across several generations of SiGe technologies are utilized to investigate the potential impacts of semiconductor process scaling (e. g., lateral/vertical scaling, changes in doping, Ge content, etc.) on the overall transient shape, magnitude, and duration. Technology scaling is shown to increase the single-event effect (SEE) sensitivity of SiGe HBTs (i. e., elevated collected charge, where 1st Gen. Q(C) < 3rd Gen. Q(C) < 4th Gen. Q(C)). Modern third-generation and fourth-generation devices under a forward-active bias (i. e., forward-biased EB junction, reverse-biased CB junction) exhibit a large diffusive transient component between the emitter and collector terminals, driving an elevation in collected charge. 3-D TCAD modeling is utilized to understand the fundamental transient mechanisms and assess the primary scaling factors affecting SEE sensitivity. Ion-strike simulations show that bulk traps can substantially enhance the charge collection mechanisms within these devices. These results suggest that SiGe technology scaling may have a strong impact on the radiation-induced transient response of SiGe HBTs, with future SiGe technology generations potentially exhibiting increased sensitivities to single-event effects.
  • Keisuke Motoki, Yu Miyazawa, Daisuke Kobayashi, Masashi Ikegami, Tsutomu Miyasaka, Tomoyuki Yamamoto, Kazuyuki Hirose
    2016 IEEE 43RD PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC) 1657-1660 2016年  査読有り
    Soft X-ray exposure effects on CH3NH3PbI3 perovskite in a patterned device sample with a similar structure to solar cells, a promising candidate for X-ray detectors, have been investigated with an X-ray Photoelectron Spectroscopy (XPS) time-dependent measurement method. Our experimental analyses demonstrate compositional change from CH3NH3PbI3 to PbI2 due to evaporation of methylammonium iodide.
  • Takahashi Tadayuki, Kokubun Motohide, Mitsuda Kazuhisa, Kelley Richard, Ohashi Takaya, Aharonian Felix, Akamatsu Hiroki, Akimoto Fumie, Allen Steve, Anabuki Naohisa, Angelini Lorella, Arnaud Keith, Asai Makoto, Audard Marc, Awaki Hisamitsu, Axelsson Magnus, Azzarello Philipp, Baluta Chris, Bamba Aya, Bando Nobutaka, Bautz Marshall, Bialas Thomas, Blandford Roger, Boyce Kevin, Brenneman Laura, Brown Greg, Bulbul Esra, Cackett Edward, Canavan Edgar, Chernyakova Maria, Chiao Meng, Coppi Paolo, Costantini Elisa, de Plaa Jelle, den Herder Jan-Willem, DiPirro Michael, Done Chris, Dotani Tadayasu, Doty John, Ebisawa Ken, Eckart Megan, Enoto Teruaki, Ezoe Yuichiro, Fabian Andrew, Ferrigno Carlo, Foster Adam, Fujimoto Ryuichi, Fukazawa Yasushi, Furuzawa Akihiro, Galeazzi Massimiliano, Gallo Luigi, Gandhi Poshak, Gilmore Kirk, Giustini Margherita, Goldwurm Andrea, Gu Liyi, Guainazzi Matteo, Haas Daniel, Haba Yoshito, Hagino Kouichi, Hamaguchi Kenji, Harayama Atsushi, Harrus Ilana, Hatsukade Isamu, Hayashi Takayuki, Hayashi Katsuhiro, Hayashida Kiyoshi, Hiraga Junko, Hirose Kazuyuki, Hornschemeier Ann, Hoshino Akio, Hughes John, Ichinohe Yuto, Iizuka Ryo, Inoue Yoshiyuki, Inoue Hajime, Ishibashi Kazunori, Ishida Manabu, Ishikawa Kumi, Ishimura Kosei, Ishisaki Yoshitaka, Itoh Masayuki, Iwata Naoko, Iyomoto Naoko, Jewell Chris, Kaastra Jelle, Kallman Timothy, Kamae Tuneyoshi, Kara Erin, Kataoka Jun, Katsuda Satoru, Katsuta Junichiro, Kawaharada Madoka, Kawai Nobuyuki, Kawano Taro, Kawasaki Shigeo, Khangulyan Dmitry, Kilbourne Caroline, Kimball Mark, King Ashley, Kitaguchi Takao, Kitamoto Shunji, Kitayama Tetsu, Kohmura Takayoshi, Kosaka Tatsuro, Koujelev Alex, Koyama Katsuji, Koyama Shu, Kretschmar Peter, Krimm Hans, Kubota Aya, Kunieda Hideyo, Laurent Philippe, Lebrun Francois, Lee Shiu-Hang, Leutenegger Maurice, Limousin Olivier, Loewenstein Michael, Long Knox, Lumb David, Madejski Grzegorz, Maeda Yoshitomo, Maier Daniel, Makishima Kazuo, Markevitch Maxim, Masters Candace, Matsumoto Hironori, Matsushita Kyoko, McCammon Dan, Mcguinness Daniel, McNamara Brian, Mehdipour Missagh, Miko Joseph, Miller Jon, Miller Eric, Mineshige Shin, Minesugi Kenji, Mitsuishi Ikuyuki, Miyazawa Takuya, Mizuno Tsunefumi, Mori Koji, Mori Hideyuki, Moroso Franco, Moseley Harvey, Muench Theodore, Mukai Koji, Murakami Hiroshi, Murakami Toshio, Mushotzky Richard, Nagano Housei, Nagino Ryo, Nakagawa Takao, Nakajima Hiroshi, Nakamori Takeshi, Nakano Toshio, Nakashima Shinya, Nakazawa Kazuhiro, Namba Yoshiharu, Natsukari Chikara, Nishioka Yusuke, Nobukawa Masayoshi, Nobukawa Kumiko, Noda Hirofumi, Nomachi Masaharu, O' Dell Steve, Odaka Hirokazu, Ogawa Hiroyuki, Ogawa Mina, Ogi Keiji, Ohno Masanori, Ohta Masayuki, Okajima Takashi, Okamoto Atsushi, Okazaki Tsuyoshi, Ota Naomi, Ozaki Masanobu, Paerels Frits, Paltani Stephane, Parmar Arvind, Petre Robert, Pinto Ciro, Pohl Martin, Pontius James, Porter F. Scott, Pottschmidt Katja, Ramsey Brian, Reynolds Christopher, Russell Helen, Safi-Harb Samar, Saito Shinya, Sakai Shin-ichiro, Sakai Kazuhiro, Sameshima Hiroaki, Sasaki Toru, Sato Goro, Sato Yoichi, Sato Kosuke, Sato Rie, Sawada Makoto, Schartel Norbert, Serlemitsos Peter, Seta Hiromi, Shibano Yasuko, Shida Maki, Shidatsu Megumi, Shimada Takanobu, Shinozaki Keisuke, Shirron Peter, Simionescu Aurora, Simmons Cynthia, Smith Randall, Sneiderman Gary, Soong Yang, Stawarz Lukasz, Sugawara Yasuharu, Sugita Hiroyuki, Sugita Satoshi, Szymkowiak Andrew, Tajima Hiroyasu, Takahashi Hiromitsu, Takeda Shin'ichiro, Takei Yoh, Tamagawa Toru, Tamura Takayuki, Tamura Keisuke, Tanaka Takaaki, Tanaka Yasuo, Tanaka Yasuyuki, Tashiro Makoto, Tawara Yuzuru, Terada Yukikatsu, Terashima Yuichi, Tombesi Francesco, Tomida Hiroshi, Tsuboi Yohko, Tsujimoto Masahiro, Tsunemi Hiroshi, Tsuru Takeshi, Uchida Hiroyuki, Uchiyama Yasunobu, Uchiyama Hideki, Ueda Yoshihiro, Ueda Shutaro, Ueno Shiro, Uno Shin'ichiro, Urry Meg, Ursino Eugenio, de Vries Cor, Wada Atsushi, Watanabe Shin, Watanabe Tomomi, Werner Norbert, Wik Daniel, Wilkins Dan, Williams Brian, Yamada Takahiro, Yamada Shinya, Yamaguchi Hiroya, Yamaoka Kazutaka, Yamasaki Noriko, Yamauchi Makoto, Yamauchi Shigeo, Yaqoob Tahir, Yatsu Yoichi, Yonetoku Daisuke, Yoshida Atsumasa, Yuasa Takayuki, Zhuravleva Irina, Zoghbi Abderahmen
    SPACE TELESCOPES AND INSTRUMENTATION 2016: ULTRAVIOLET TO GAMMA RAY 9905 2016年  査読有り
  • Yu Miyazawa, Masashi Ikegami, Tsutomu Miyasaka, Takeshi Ohshima, Mitsuru Imaizumi, Kazuyuki Hirose
    2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 2015年12月14日  査読有り
    Perovskite solar cells are a candidate for use as space solar cells, and their radiation response is studied here for the first time. Perovskite solar cells are fabricated on a quartz substrate to prevent substrate degradation, which might otherwise affect the evaluation of radiation tolerance of the cells. As a result, superior radiation tolerance of perovskite solar cells is indicated from the comparison of output performance of the cells before and after 1-MeV electron irradiation with fluence as high as 1 × 1016 cm-2. The short-circuit current, open-circuit voltage, and external quantum efficiency do not deteriorate under electron irradiation. These results suggest that perovskite solar cells are likely to be useful for space application.
  • Daisuke Kobayashi, Yuya Kakehashi, Kazuyuki Hirose, Shinobu Onoda, Takahiro Makino, Takeshi Ohshima, Shoji Ikeda, Michihiko Yamanouchi, Hideo Sato, Eli Christopher Enobio, Tetsuo Endoh, Hideo Ohno
    IEEE TRANSACTIONS ON NUCLEAR SCIENCE 61(4) 1710-1716 2014年8月  査読有り
    A non-volatile memory element called a perpendicular-anisotropy magnetic tunnel junction was fabricated using CoFeB/MgO/CoFeB film stack technology. It exhibits two stable resistance values, high or low, depending on the relative directions of the magnetizations of the two ferromagnetic CoFeB layers. After being programmed into the high resistance state with a current injection scheme based on the spin transfer torque theory, the tunnel junction was exposed to 15-MeV Si ions under different voltage stress conditions. The tested structure remained in the programmed high resistance state after being bombarded with 10-100 Si ions, even under the stressed situations. A time-domain analysis proved that this result is due to the perfect immunity of the tested magnetic tunnel junction to single event upsets. Some degradation in resistance due to the heavy-ion irradiation was detected through a precise parameter analysis based on a tunneling theory but it was negligibly small (1%). There were no statistically significant changes in the thermal stability factor before and after irradiation, and this means the long-term retention properties remained unchanged.
  • Tadayuki Takahashi, Kazuhisa Mitsuda, Richard Kelley, Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steve Allen, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Makoto Asai, Marc Audard, Hisamitsu Awaki, Philipp Azzarello, Chris Baluta, Aya Bamba, Nobutaka Bando, Marshall Bautz, Thomas Bialas, Roger D. Blandford, Kevin Boyce, Laura Brenneman, Gregory Brown, Ed Cackett, Edgar Canavan, Maria Chernyakova, Meng Chiao, Paolo Coppi, Elisa Costantini, Jelle De Plaa, Jan Willem Den Herder, Michael Dipirro, Chris Done, Tadayasu Dotani, John Doty, Ken Ebisawa, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, Carlo Ferrigno, Adam Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Stefan Funk, Akihiro Furuzawa, Massimiliano Galeazzi, Luigi Gallo, Poshak Gandhi, Kirk Gilmore, Matteo Guainazzi, Daniel Haas, Yoshito Haba, Kenji Hamaguchi, Atsushi Harayama, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Kiyoshi Hayashida, Junko Hiraga, Kazuyuki Hirose, Ann Hornschemeier, Akio Hoshino, John Hughes, Una Hwang, Ryo Iizuka, Yoshiyuki Inoue, Kazunori Ishibashi, Manabu Ishida, Kumi Ishikawa, Kosei Ishimura, Yoshitaka Ishisaki, Masayuki Itoh, Naoko Iwata, Naoko Iyomoto, Chris Jewell, Jelle Kaastra, Timothy Kallman, Tuneyoshi Kamae, Jun Kataoka, Satoru Katsuda, Junichiro Katsuta, Madoka Kawaharada, Nobuyuki Kawai, Taro Kawano, Shigeo Kawasaki, Dmitry Khangaluyan, Caroline Kilbourne, Mark Kimball, Masashi Kimura, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Motohide Kokubun, Saori Konami, Tatsuro Kosaka, Alexander Koujelev, Katsuji Koyama, Hans Krimm, Aya Kubota, Hideyo Kunieda
    Proceedings of SPIE - The International Society for Optical Engineering 9144 2014年  査読有り
    © 2014 SPIE.The joint JAXA/NASA ASTRO-H mission is the sixth in a series of highly successful X-ray missions developed by the Institute of Space and Astronautical Science (ISAS), with a planned launch in 2015. The ASTRO-H mission is equipped with a suite of sensitive instruments with the highest energy resolution ever achieved at E > 3 keV and a wide energy range spanning four decades in energy from soft X-rays to gamma-rays. The simultaneous broad band pass, coupled with the high spectral resolution of ΔE ≤ 7 eV of the micro-calorimeter, will enable a wide variety of important science themes to be pursued. ASTRO-H is expected to provide breakthrough results in scientific areas as diverse as the large-scale structure of the Universe and its evolution, the behavior of matter in the gravitational strong field regime, the physical conditions in sites of cosmic-ray acceleration, and the distribution of dark matter in galaxy clusters at different redshifts.
  • Daisuke Kobayashi, Kazuyuki Hirose, Hirobumi Saito
    MICRO- AND NANOTECHNOLOGY SENSORS, SYSTEMS, AND APPLICATIONS V 8725 2013年  査読有り
    Development of semiconductor devices not only for harsh radiation environments such as space but also for ground-based applications now faces a major hurdle of radiation problems. Necessary is protecting chips from malfunctions due to sub-nanosecond transient noises induced by radiation. As a protection technique using the silicon-on-insulator structure is often suggested, but the use in fact requires devices and circuits carefully optimized for maximizing its benefits. Mainly describing theoretical and experimental characterization of the transient effects, this paper presents a comprehensive study on radiation responses of commercial silicon-on-insulator technologies, which study results in a space-use low-power system-on-chip with a 100-MIPS RISC-based core.
  • Daisuke Kobayashi, Yuya Kakehashi, Kazuyuki Hirose, Shinobu Onoda, Takahiro Makino, Takeshi Ohshima, Shoji Ikeda, Michihiko Yamanouchi, Hideo Sato, Eli Christopher Enobio, Tetsuo Endoh, Hideo Ohno
    2013 14TH EUROPEAN CONFERENCE ON RADIATION AND ITS EFFECTS ON COMPONENTS AND SYSTEMS (RADECS) 2013年  査読有り
    A non-volatile memory element that is called a perpendicular- anisotropy magnetic tunnel junction has been fabricated in a CoFeB/MgO/CoFeB film stack technology. It exhibits two stable resistance values, high or low, depending on the relative direction of magnetization of the two ferromagnetic CoFeB layers. After programmed into the high resistance state with a current injection scheme based on the spin transfer torque theory, the tunnel junction has been exposed to 15-MeV Si ions in different voltage stress conditions. It has been observed that the tested structure remains in the programmed high resistance state after received the bombardments of several tens of Si ions and more, even under the stressed situations. A time- domain analysis has proven that this result is due to the perfect immunity of the tested magnetic tunnel junction to single event upsets. A resistance degradation due to the heavy-ion irradiation has been detected through a precise parameter analysis based on a tunneling theory but negligibly small, 1%.
  • Toyoaki Suzuki, Takehiko Wada, Kazuyuki Hirose, Hironobu Makitsubo, Hidehiro Kaneda
    Publications of the Astronomical Society of the Pacific 124(918) 823-829 2012年8月  査読有り
    We have evaluated the optical and electrical properties of a far-infrared (IR) transparent electrode for extrinsic germanium (Ge) photoconductors at 4 K, which was fabricated by molecular beam epitaxy (MBE). As a far-IR transparent electrode, an aluminum (Al)-doped Ge layer is formed at well-optimized doping concentration and layer thickness in terms of the three requirements: high far-IR transmittance, low-resistivity, and excellent ohmic contact. The Al-doped Ge layer has the far-IR transmittance of &gt 95% within the wavelength range of 40-200 μm, while low-resistivity (~5 Ωcm) and ohmic contact are ensured at 4 K. We demonstrate the applicability of the MBE technology in fabricating the far-IR transparent electrode satisfying the above requirements. © 2012. The Astronomical Society of the Pacific. All rights reserved.
  • Haruto Kanamori, Tsuyoshi Yoshioka, Kazuyuki Hirose, Tomoyuki Yamamoto
    JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA 185(5-7) 129-132 2012年8月  査読有り
    The valence states of the Mn ions in Pr(1-x)A(x)MnO(3-delta) (A = Ca, Sr) are investigated by Mn-L-3 X-ray absorption near-edge structure (XANES) analysis. The spectral fine structures in the Mn-L-3 XANES analysis show a significant difference between Pr0.5Ca0.5MnO3-delta and Pr0.5Sr0.5MnO3-delta, a paramagnetic insulator and a ferromagnetic metal, respectively, at room temperature, whereas the spectral structures of Pr0.7Ca0.3MnO3-delta and Pr0.7Sr0.3MnO3-delta, paramagnetic insulators, are almost identical. These results indicate that the valence states of the Mn ions in these materials are highly correlated with their magnetic and electrical properties. A significant difference was also found between the Mn-L-3 XANES profiles of Pr1-xCaxMnO3-delta and the profiles formed by the linear combination of the Mn-L-3 XANES spectra of PrMnO3 (Mn3+) and CaMnO3 (Mn4+). This difference indicates that the Mn ions in these materials do not have a mixed-valence state of 3+ and 4+, but have an intermediate valence state o 3+ and 4+. (c) 2012 Elsevier B.V. All rights reserved.
  • Hiroshi Seki, Yasuhiro Shibuya, Daisuke Kobayashi, Hiroshi Nohira, Kenji Yasuoka, Kazuyuki Hirose
    JAPANESE JOURNAL OF APPLIED PHYSICS 51(4) 2012年4月  査読有り
    To achieve metal-oxide-semiconductor field-effect transistors (MOSFETs) with high reliability, it is important to investigate the dielectric breakdown of gate oxide films of MOSFETs. It is known that dielectric breakdown is usually due to the presence of defects in films. Estimating the breakdown electric-field strength while reflecting local structures such as defects is important for investigation of the reliability of gate SiO2 films. In this study, we introduce the "recovery rate'', which is a parameter potentially capable of estimating the breakdown electric-field strength while reflecting the local structures of the film. The recovery rate has a strong correlation with the breakdown electric-field strength of bulk Si and Al compounds. Using this correlation, we estimate the breakdown electric-field strength of SiO2 with oxygen vacancies and strains. (C) 2012 The Japan Society of Applied Physics
  • Tadayuki Takahashi, Kazuhisa Mitsuda, Richard Kelley, Henri Aarts, Felix Aharonian, Hiroki Akamatsu, Fumie Akimotoe, Steve Allen, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Makoto Asai, Marc Audard, Hisamitsu Awaki, Philipp Azzarello, Chris Baluta, Aya Bamba, Nobutaka Bando, Mark Bautz, Roger Blandford, Kevin Boyce, Greg Brown, Ed Cackett, Maria Chernyakova, Paolo Coppi, Elisa Costantini, Jelle De Plaa, Jan Willem Den Herder, Michael DiPirro, Chris Done, Tadayasu Dotani, John Doty, Ken Ebisawa, Megan Eckart, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, Carlo Ferrigno, Adam Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Stefan Funk, Akihiro Furuzawa, Massimiliano Galeazzi, Luigi Gallo, Poshak Gandhi, Keith Gendreau, Kirk Gilmore, Daniel Haas, Yoshito Haba, Kenji Hamaguchi, Isamu Hatsukade, Takayuki Hayashi, Kiyoshi Hayashida, Junko Hiraga, Kazuyuki Hirose, Ann Hornschemeier, Akio Hoshino, John Hughes, Una Hwang, Ryo Iizuka, Yoshiyuki Inoue, Kazunori Ishibashi, Manabu Ishida, Kosei Ishimura, Yoshitaka Ishisaki, Masayuki Ito, Naoko Iwat, Naoko Iyomoto, Jelle Kaastr, Timothy Kallman, Tuneyoshi Kamae, Jun Kataoka, Satoru Katsuda, Hajime Kawahara, Madoka Kawaharada, Nobuyuki Kawai, Shigeo Kawasaki, Dmitry Khangaluyan, Caroline Kilbourne, Masashi Kimura, Kenzo Kinugasaa, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Motohide Kokubun, Tatsuro Kosaka, Alex Koujelev, Katsuji Koyama, Hans Krimm, Aya Kubota, Hideyo Kunieda, Stephanie LaMass, Philippe Laurent, Francois Lebrun, Maurice Leutenegger, Olivier Limousin, Michael Loewenstein, Knox Long, David Lumb
    Proceedings of SPIE - The International Society for Optical Engineering 8443 2012年  査読有り
    The joint JAXA/NASA ASTRO-H mission is the sixth in a series of highly successful X-ray missions initiated by the Institute of Space and Astronautical Science (ISAS). ASTRO-H will investigate the physics of the highenergy universe via a suite of four instruments, covering a very wide energy range, from 0.3 keV to 600 keV. These instruments include a high-resolution, high-Throughput spectrometer sensitive over 0.3-12 keV with high spectral resolution of ?E 5 7 eV, enabled by a micro-calorimeter array located in the focal plane of thin-foil X-ray optics; hard X-ray imaging spectrometers covering 5-80 keV, located in the focal plane of multilayer-coated, focusing hard X-ray mirrors; a wide-field imaging spectrometer sensitive over 0.4-12 keV, with an X-ray CCD camera in the focal plane of a soft X-ray telescope; and a non-focusing Compton-camera type soft gamma-ray detector, sensitive in the 40-600 keV band. The simultaneous broad bandpass, coupled with high spectral resolution, will enable the pursuit of a wide variety of important science themes. © 2012 SPIE.
  • Daisuke Kobayashi, Eddy Simoen, Sofie Put, Alessio Griffoni, Marc Poizat, Kazuyuki Hirose, Cor Claeys
    IEEE TRANSACTIONS ON NUCLEAR SCIENCE 58(3) 800-807 2011年6月  査読有り
    Proton irradiation effects on fin-type field effect transistors (FinFETs) are examined from the viewpoint of their electrical-performance parameter of mobility. They are fabricated with various types of combination of strain/stress techniques to control their mobilities. The base stress level is globally modified by means of nonstrained or strained silicon-on-insulator wafers. Some process splits, additionally, receive a local strain tuning with a contact-etch-stop layer (CESL). Both n- and p-type FinFETs are evaluated. A 60-MeV proton irradiation with a fluence of 10(12) p/cm(2) leads to mobility changes for wide-fin samples: degradation for n-type and enhancement for p-type. These mobility variations can be explained with a change in the number of charged interface traps at the Si and buried-oxide interface. Narrow-fin devices exhibit mobility changes unnoticeable statistically. A comparison with previous studies indicates an elevated source/drain structure plays a role in this mobility preservation. Although the mobility is kept intact in the narrow-fin samples, a close investigation based on a two channel-component model can reveal noticeable mobility variations at a component level. In this study, observed mobility changes are complex depending on the adopted stress techniques as well as process parameters and cannot be explained by the stress levels simply.
  • D. Matsuura, K. Hirose, D. Kobayashi, S. Ishii, M. Kusano, Y. Kuroda, H. Saito
    Proceedings of the European Conference on Radiation and its Effects on Components and Systems, RADECS 150-155 2011年  査読有り
    We designed a phase-locked loop (PLL) operating at 200 MHz using 0.2 μm fully depleted silicon-on-insulator (SOI) technology. By SPICE simulation with an appropriate single-event transient (SET) model, we achieved a radiation-hardened PLL that does not cause a SET upset upon ion irradiation with a linear energy transfer (LET) of 50 MeV-cm 2/mg at an areal penalty of 75%. © 2011 IEEE.
  • Daisuke Kobayashi, Kazuyuki Hirose, Hirokazu Ikeda, Hirobumi Saito
    ADVANCED SEMICONDUCTOR-ON-INSULATOR TECHNOLOGY AND RELATED PHYSICS 15 35(5) 201-210 2011年  査読有り
    A comprehensive study on radiation-induced pulse noises in SOI CMOS logic is reviewed. The noise pulses are called single event transients or SETs and becoming a serious source of soft errors in logic systems. As a result of miniaturization of transistors, concern about the soft error problems caused by the SETs are growing not only in special applications for harsh radiation environments like space but also in usual ones used on the ground. It is important to reveal what the SET is in its nature. Measurement techniques and analytical model have been developed for the purpose. They are introduced together with experimental data obtained with test circuits fabricated by a commercial 0.2-mu m fully-depleted SOI technology. Issues to be solved for use of SOI technologies in realizing radiation hardened devices are also described with a practical example, or a development process of radiation hardened SOI SRAMs.
  • D. Kobayashi, M. Bargallo Gonzalez, E. Rosseel, A. Hikavyy, K. Hirose, E. Simoen, C. Claeys
    ECS Transactions 33(11) 191-202 2010年  査読有り
    SiGe epitaxial layers receiving sub-melt laser annealing after Carbon and Boron co-implantations are investigated. Their electrical properties have been evaluated in the reverse bias region of the IV and CV characteristics of SiGe/Si diode structures. Large dc leakage currents and frequency-dependent capacitance dispersions are observed. They are indicating the presence of electrically active defects in the studied devices. Combined IV and CV analysis suggests that the defectivity of the B-induced end-of-range defects can be enhanced by the laser treatment. This laser-driven enhancement can be suppressed by the C co-implantations. Experimental results also indicate that this C treatment is strongly affected by the laser annealing conditions. ©The Electrochemical Society.
  • T. Shimada, H. Toyota, A. Kukita, M. Imaizumi, K. Hirose, M. Tajima, H. Ogawa, H. Hayakawa, A. Okamoto, Y. Nozaki, H. Watabe, T. Hisamatsu
    Conference Record of the IEEE Photovoltaic Specialists Conference 1112-1117 2010年  査読有り
    The Japan Aerospace Exploration Agency has been developing the Mercury Magnetospheric Orbiter (MMO), which is Japanese part of the BepiColombo mission. During its mission around Mercury, the spacecraft will be exposed to high solar irradiance of up to 11 suns, with an estimated maximum solar panel temperature of 230°C. In such an environment, solar cells are required to operate under high intensity and high temperature (HIHT) conditions. Therefore, it is necessary to evaluate the durability of solar cells to meet the power requirements throughout the mission life. We conducted a continuous operation test under HIHT conditions to examine the validity of the solar array configuration, using the interior planetary thermal vacuum chamber. Our HIHT tests clarified the following facts: (i) Transparency of the coverglass and the performance of the solar cells do not degrade and (ii) transparency of the DC93-500 adhesive in the top cell response region degrades mainly due to ultraviolet exposure at high temperatures. We decided to use AR0213 coverglass (from JDSU) with a thickness of 300 μm, which have a longer cut-on wavelength in ultraviolet region. With this configuration, the predicted decrease in Pmax due to the HIHT environment is 17.3% and that due to radiation effects is 11.0% Our new design will offer the available power at EOL of 394.2 W, which is 46.7 W greater than the required power. © 2010 IEEE.
  • T. Makino, S. Onoda, T. Hirao, T. Ohshima, D. Kobayashi, K. Hirose
    REPORT OF RESEARCH CENTER OF ION BEAM TECHNOLOGY, HOSEI UNIVERSITY, SUPPL NO 28 28 35-40 2010年  査読有り
    SET-induced soft-error rates (SERSET) in logic LSIs are estimated from SET pulse-widths measured in logic cells used in logic LSIs. The estimated rates are consistent with directly measured SERSETS for logic LSIs.
  • K. Tsugawa, H. Noda, K. Hirose, H. Kawarada
    PHYSICAL REVIEW B 81(4) 2010年1月  査読有り
    Chemical trends of Schottky barrier heights of ten kinds of metal contacts on hydrogen-terminated diamond (001) surfaces are estimated from the temperature dependence of their current-voltage characteristics. In addition to the measurements, the interface of the metal/hydrogen-terminated diamond is theoretically modeled including the carrier density of the surface conductive layer and the electron-affinity variation from the clean surface of the hydrogen-terminated diamond. Based on the model, a relation among the carrier density, the electron affinity variation, and the barrier heights are derived. The relation explains well experimental results of and other than the present work.
  • Yoshimitsu Yanagawa, Daisuke Kobayashi, Hirokazu Ikeda, Hirobumi Saito, Kazuyuki Hirose
    IEEE TRANSACTIONS ON NUCLEAR SCIENCE 55(4) 1947-1952 2008年8月  査読有り
    A scan flip-flop (FF) is designed to observe both single event transient (SET) and single event upset (SEU) soft errors in logic VLSI systems. The SET and SEU soft errors mean the upset caused by latching an SET pulse that originates in combinational logic blocks and the upset caused by a direct ion hit to the FF, respectively. An irradiation test method using the scan FF is proposed to obtain SET and SEU soft-error rates at each FF distributed in logic VLSI systems. A test chip is designed using a 0.2-mu m fully-depleted silicon-on-insulator standard cell library. The basic concepts have been validated with Verilog timing simulations. The cell-level implementation costs of the proposed scan FF are estimated to be reasonable.
  • V. Ferlet-Cavrois, D. McMorrow, D. Kobayashi, N. Fel, J. S. Melinger, P. Paillet, V. Pouget, F. Essely, J. Baggio, S. Girard, R. S. Flores, J. R. Schwank, P. E. Dodd, M. R. Shaneyfelt, K. Hirose, H. Saito
    Proceedings of the European Conference on Radiation and its Effects on Components and Systems, RADECS 169-174 2008年  査読有り
    A new technique is developed to precisely measure the width of propagating voltage transients induced by irradiation of inverter chains. The technique is based on the measurement of the supply current in a detection inverter. © 2008 IEEE.
  • T Ono, S Tsukamoto, K Hirose
    APPLIED PHYSICS LETTERS 82(25) 4570-4572 2003年6月  査読有り
    A theoretical analysis of a relation between atomic and spin-electronic structures for the ground state of single-row aluminum nanowires suspended between Al(001) electrodes is demonstrated using first-principles structural optimizations. We obtain an unusual result that a three-aluminum-atom nanowire sandwiched between the electrodes does not manifest magnetic ordering, although an isolated aluminum trimer molecule in a straight line is spin-polarized. On the other hand, a five-atom nanowire exhibits ferromagnetic ordering, where three central atoms form a spin-polarized trimer. Moreover, in the case of an eight-atom nanowire, the middle atoms in the nanowire form two spin-polarized trimers with antiferromagnetic ordering. (C) 2003 American Institute of Physics.
  • S Tsukamoto, K Hirose
    PHYSICAL REVIEW B 66(16) 2002年10月  査読有り
    We present first-principles calculations on electron transport through Na nanowires at finite bias voltages. A nanowire exhibits a nonlinear current-voltage characteristic and negative differential conductance (NDC). NDC is induced by the drastic suppression of the electron-transmission peaks which is attributed to the reduction of the electron conductance through the negatively biased side of the system. The mechanism of the occurrence of NDC is also demonstrated based on the finding that a voltage drop locally occurs on the negatively biased end of the nanowire.
  • K. Hirose, K. Sakano, H. Nohira, T. Hattori
    Physical Review B - Condensed Matter and Materials Physics 64(15) 2001年  査読有り
    X-ray photoelectron spectroscopic evaluation of the (formula presented) interface reveals that the valence-band offset differs by about 0.19 eV between two types of atomic structures that contain Si atoms in different intermediate-oxidation states. The difference in the valence-band offset is reproduced by a first-principles molecular orbital calculation for model clusters (formula presented) and (formula presented) of the two interface structures. It is concluded that the valence-band offset at the interface with more Si atoms in the 3+ oxidation state than in the 1+ oxidation state is larger than the valence-band offset at the interface with more Si atoms in the 1+ oxidation state. This is thought to be a result of the depolarization effect making the interface dipole smaller at the interface with more Si atoms in the 3+ oxidation state. © 2001 The American Physical Society.

MISC

 351
  • 小林大輔, 廣瀬和之
    応用物理 92(2) 89-93 2023年2月  
  • Kazuyuki Hirose, Daisuke Kobayashi, Taichi Ito, Tetsuo Endoh
    JAPANESE JOURNAL OF APPLIED PHYSICS 56(8) 2017年8月  
    The memory reliability of magnetic tunnel junctions has been examined from the aspect of their potential use in disaster-resilient computing. This computing technology requires memories that can keep stored information intact even in power-cut emergency situations. Such a requirement has been quantified as a score of acceptable flip probability, which is the failure in time (FIT) rate of 1 for a single-interface perpendicular magnetic tunnel junction (p-MTJ) with a disk diameter of 20 nm. For comparison with this acceptable probability, p-MTJ memory reliability has been evaluated. The risk of particle radiation bombardments, i.e., alpha particles and neutrons-the well-known soft error sources on the ground-has been evaluated from the aspects of both frequency of bombardments and the hazardous effects of bombardments. This study highlights that high-energy terrestrial neutrons may lead to soft errors in p-MTJs, but the flip probability, or the risk, is expected to be lower than 1 x 10(-6) FIT/p-MTJ, which is much smaller than the target probability. It has also been found that the use of p-MTJs can reduce the risk by three orders of magnitude compared with that of the conventional SRAMs. Few risks have been suggested for other radiation particles, such as alpha particles and thermal neutrons. (C) 2017 The Japan Society of Applied Physics
  • 天野裕士, 天野裕士, 小林大輔, 野平博司, 廣瀬和之
    応用物理学会春季学術講演会講演予稿集(CD-ROM) 62nd 2015年  
  • 廣瀬 和之, 小林 大輔
    応用物理 83(8) 655-659 2014年8月  
  • Takanobu Shimada, Hiroyuki Toyota, Kazuyuki Hirose, Yoshitomo Maeda, Kazuhisa Mitsuda
    2014 IEEE 40TH PHOTOVOLTAIC SPECIALIST CONFERENCE (PVSC) 2161-2165 2014年  
    This paper presents analysis results for the onorbit performance of a solar array paddle of the X-ray astronomy satellite Suzaku. The current generated by the solar array was decreasing significantly for approximate one year after mid-2011. We estimated the degradation of the output by simulating the on-orbit environment according to the JPL prediction method. The analysis results indicate that the on-orbit degradation of the solar array paddle is greater than the predicted performance degradation in a space environment. We determined that the difference between the on-orbit data and the analysis results could be attributed to either an increase in cell temperature or radiation degradation due to solar flares.
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書籍等出版物

 8
もっとみる

講演・口頭発表等

 34
もっとみる

所属学協会

 1

共同研究・競争的資金等の研究課題

 16
もっとみる

● 指導学生等の数

 1
  • 年度
    2018年度(FY2018)
    博士課程学生数
    東大生　1名
    修士課程学生数
    東大生　2名
    受託指導学生数
    2名
    技術習得生の数
    3名

● 指導学生の表彰・受賞

 1
  • 指導学生名
    東口　紳太郎
    所属大学
    東京大学
    受賞内容（タイトル、団体名等）
    the 2017 RADECS sponsorship
    受賞年月日
    2017.10

● 指導学生の顕著な論文

 12
  • 指導学生名
    萩本賢哉
    所属大学
    東京大学
    著者名, ジャーナル名, 巻号ページ（出版年）
    Y. Hagimoto, H. Fujioka, M. Oshima , and K. Hirose, Applied Physics Letters, 77(25), pp. 4175-4177 (2000)
    論文タイトル
    Characterizing carrier-trapping phenomena in ultrathin SiO2 films by using the x-ray photoelectron spectroscopy time-dependent measurements
    DOI
    http://doi.org/10.1063/1.1334657
  • 指導学生名
    榎本貴志
    所属大学
    名古屋大学
    著者名, ジャーナル名, 巻号ページ（出版年）
    T. Emoto,, K. Akimoto, A. Ichimiya, K. Hirose, Applied Surface Science, 190(1-4), pp. 113-120 (2002)
    論文タイトル
    Strain due to nickel diffusion into hydrogen-terminated Si(1 1 1) surface
    DOI
    https://doi.org/10.1016/S0169-4332(01)00852-2
  • 指導学生名
    高橋健介
    所属大学
    武蔵工業大学
    著者名, ジャーナル名, 巻号ページ（出版年）
    K. Takahashi, H. Nohira, K. Hirose, and T. Hattori, Applied Physics Letters 83(16), pp. 3422-3424 (2003)
    論文タイトル
    Accurate determination of SiO2 film thickness by x-ray photoelectron spectroscopy
    DOI
    https://doi.org/10.1063/1.1616204
  • 指導学生名
    柳川善光
    所属大学
    東京大学
    著者名, ジャーナル名, 巻号ページ（出版年）
    Y. Yanagawa, K. Hirose, H. Saito, D. Kobayashi, S. Fukuda, S. Ishii, D. Takahashi, K. Yamamoto, and Y. Kuroda, IEEE Transactions on Nuclear Science, 53 (6) pp. 3575-3578 (2006)
    論文タイトル
    Direct measurement of SET pulse widths in 0.2-μm SOI logic cells irradiated by heavy ions
  • 指導学生名
    牧野高紘
    所属大学
    総合研究大学院大学
    著者名, ジャーナル名, 巻号ページ（出版年）
    T. Makino, D. Kobayashi, K. Hirose, Y. Yanagawa, H. Saito, D. Takahashi, S. Ishii, M. Kusano, S. Onoda, T. Hirao, and T. Ohshima, IEEE Transactions on Nuclear Science, 56 (1) pp. 202-207 (2009)
    論文タイトル
    LET dependence of single event transient pulse-widths in SOI logic cell
    DOI
    https://doi.org/10.1109/TNS.2008.2009054
  • 指導学生名
    津川和夫
    所属大学
    早稲田大学
    著者名, ジャーナル名, 巻号ページ（出版年）
    K. Tsugawa, H. Noda, K. Hirose, and H. Kawarada, Physical Review B, 81 pp. 045303-1-0045303-11 (2010)
    論文タイトル
    Schottky barrier heights, carrier density, and negative electron affinity of hydrogen-terminated diamond
    DOI
    https://doi.org/10.1103/PhysRevB.81.045303
  • 指導学生名
    近田旬佑
    所属大学
    早稲田大学
    著者名, ジャーナル名, 巻号ページ（出版年）
    S. Chikada, K. Hirose, and T. Yamamoto, Japanese Journal of Applied Physics, 49 pp. 091502-1-091502-3 (2010)
    論文タイトル
    Analysis of local environment of Fe ions in hexagonal BaTiO3
    DOI
    https://doi.org/133.74.120.63 on 04/02/2021
  • 指導学生名
    金盛治人
    所属大学
    早稲田大学
    著者名, ジャーナル名, 巻号ページ（出版年）
    H. Kanamori, T. Yoshioka, K. Hirose, and T. Yamamoto, Journal of Electron Spectroscopy and Related Phenomena, 185 pp. 129-132 (2012)
    論文タイトル
    Determination of valence state of Mn ions in Pr1-xAxMnO3-δ (A = Ca, Sr) by Mn-L3 X-ray absorption near-edge structure analysis
    DOI
    https://doi.org/10.1016/j.elspec.2012.03.003
  • 指導学生名
    元木啓介
    所属大学
    早稲田大学
    著者名, ジャーナル名, 巻号ページ（出版年）
    K. Motoki, Y. Miyazawa, D. Kobayashi, M. Ikegami, T. Miyasaka, T. Yamamoto, and K. Hirose, Journal of Applied Physics, 121 (8) pp. 085501-1-085501-4 (2017)
    論文タイトル
    Degradation of CH3NH3PbI3 perovskite due to soft x-ray irradiation as analyzed by an x-ray photoelectron spectroscopy time-dependent measurement method
    DOI
    https://doi.org/10.1063/1.4977238
  • 指導学生名
    井辻宏章
    所属大学
    東京大学
    著者名, ジャーナル名, 巻号ページ（出版年）
    H. Itsuji, D. Kobayashi, O. Kawasaki, D. Matsuura, T. Narita, M. Kato, S. Ishii, K. Masukawa, and K. Hirose, IEEE Transactions on Nuclear Science, 65 (1) pp. 346-353 (2018)
    論文タイトル
    Laser visualization of the development of long line-type multi-cell upsets in back-biased SOI SRAMs
    DOI
    https://doi.org/10.1109/TNS.2017.2776169
  • 指導学生名
    山口記功
    所属大学
    早稲田大学
    著者名, ジャーナル名, 巻号ページ（出版年）
    K. Yamaguchi, D. Kobayashi, T. Yamamoto, and K. Hirose, Physica B, 532 pp. 99-102 (2018)
    論文タイトル
    Theoretical investigation of the breakdown electric field of SiC polymorphs
    DOI
    https://doi.org/10.1016/j.physb.2017.03.042
  • 指導学生名
    チョン　チンハン
    所属大学
    東京大学
    著者名, ジャーナル名, 巻号ページ（出版年）
    C-H. Chung, D. Kobayashi, and K. Hirose, IEEE Transactions on Device and Materials Reliability, 18 (4) pp. 574-582 (2018)
    論文タイトル
    Resistance-based modeling for soft errors in SOI SRAMs caused by radiation-induced potential perturbation under the BOX
    DOI
    https://doi.org/10.1109/TDMR.2018.2873220

● 専任大学名

 2
  • 専任大学名
    総合研究大学院大学（SOKENDAI)
  • 専任大学名
    東京大学（University of Tokyo)

● 所属する所内委員会

 8
  • 所内委員会名
    電子部品デバイス・電源グループ
  • 所内委員会名
    宇宙科学技術・専門統括
  • 所内委員会名
    宇宙科学基盤技術統括
  • 所内委員会名
    宇宙機応用工学研究系
  • 所内委員会名
    運営協議会委員
  • 所内委員会名
    知財委員
  • 所内委員会名
    研究所会議構成員
  • 所内委員会名
    宇宙工学委員会委員
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