New evidence for zero-temperature relaxation in a spin-polarized fermi liquid |
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Authors: | Akimoto H Candela D Xia J S Mullin W J Adams E D Sullivan N S |
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Affiliation: | Physics Department, University of Massachusetts, Amherst, Massachusetts 01003, USA. |
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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>or=1.73 mK. The 3He concentration x(3) was adjusted close to the value x(c) approximately 3.8% at which the spin-rotation parameter muM0 vanishes. In this way the transverse and longitudinal spin-diffusion coefficients D( perpendicular ),D( parallel ) were measured while keeping |muM(0)|<1. It is found that the temperature dependence of D( perpendicular ) deviates strongly from 1/T(2), with anisotropy temperature T(a)=4.26(+0.18)(-0.44) 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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