R. Masutomi, K. Kimura, S. Kobayashi, A. Yamaguchi, H. Ishimoto, H. Kojima
LOW TEMPERATURE PHYSICS, PTS A AND B 850 85-+ 2006年 査読有り
The spin relaxation time (tau) in superfluid He-3 A, phase is measured by observing the magnetic fountain pressure induced across a superleak. Preliminary data are reported on the dependence of T on applied magnetic field (H), pressure and 4 He coverage. When 0.5 < H < 1 tesla, tau increases linearly with H in accordance with Hammel-Richardson model. However, tau varies little with field when 2 < H < 8 tesla. As pressure is decreased, tau increases. When the interior wall surfaces (including those of heat exchanger) are covered with five layers of He-4, tau does not change significantly. Conflicting observations show that the driven spin flow phenomena are not well understood. A new oscillatory behavior in magnetic fountain effect at 29 bars is also described.