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New Evidence for Zero-Temperature Relaxation in a Spin-Polarized Fermi Liquid

H. Akimoto·D. Candela·J. S. Xia·W. J. Mullin·E. D. Adams·N. S. Sullivan
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Abstract

Spin-echo experiments are reported for 3He-4He solutions under extremely high B/T conditions, B=14.75 T and T >= 1.73 mK. The 3He concentration x_3 was adjusted close to the value x_c = 3.8% at which the spin rotation parameter muM_0 vanishes. In this way the transverse and longitudinal spin diffusion coefficients D_perp, D_parallel were measured while keeping |muM_0| < 1. It is found that the temperature dependence of D_perp deviates strongly from 1/T^2, with anisotropy temperature T_a = 4.26 +/- 0.18 mK. This value is close to the theoretical prediction for dilute solutions, and suggests that spin current relaxation remains finite as the temperature tends to zero.

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H. Akimoto, D. Candela, J. S. Xia, W. J. Mullin, E. D. Adams, N. S. Sullivan. 2002-09-15. New Evidence for Zero-Temperature Relaxation in a Spin-Polarized Fermi Liquid. https://doi.org/10.1103/physrevlett.90.105301

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