2002/09/15 by H. Akimoto, Hikota Akimoto, D. Candela +5 · 2 citations
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #NMR spectroscopy and applications #Quantum, superfluid, helium dynamics #cond-mat
paper · pdf · doi:10.1103/physrevlett.90.105301
4 pages, 4 figures; for v2 added one sentence in discussion "It is possible that the spin dynamics are modified..." and added Ref. 22
arxiv created 2002/09/15 · openalex publication_date 2003/03/12 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Spin-echo experiments are reported for 3He\mathrm\text\ensuremath-4He solutions under extremely high B/T conditions, B=14.75 T and T\ensuremath≥1.73 mK. The 3He concentration x3 was adjusted close to the value xc\ensuremath≈3.8% at which the spin-rotation parameter \ensuremathμM0 vanishes. In this way the transverse and longitudinal spin-diffusion coefficients D_\ensuremath⊥,D_\ensuremath∥ were measured while keeping |\ensuremathμM0|<1. It is found that the temperature dependence of D_\ensuremath⊥ deviates strongly from 1/T2, with anisotropy temperature Ta=4.26_\ensuremath-0.44+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.