Abstract
The spin relaxation time (τ) in superfluid 3He A1 phase is measured by observing the magnetic fountain pressure induced across a superleak. Preliminary data are reported on the dependence of τ on applied magnetic field (H), pressure and 4He coverage. When 0.5 < H <1 tesla, τ increases linearly with H in accordance with Hammel‐Richardson model. However, τ varies little with field when 2 < H < 8 tesla. As pressure is decreased, τ increases. When the interior wall surfaces (including those of heat exchanger) are covered with five layers of 4He, τ 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.
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