Journal of Low Temperature Physics

, Volume 126, Issue 1–2, pp 109–114

Spin Transport in Very Dilute 3He-4He at Very High B/T

  • H. Akimoto
  • J. S. Xia
  • E. D. Adams
  • D. Candela
  • W. J. Mullin
  • N. S. Sullivan
Article

Abstract

We report preliminary results for pulsed-NMR measurements on a very dilute 3He-4He mixture (x3=900 ppm) in a 14.74 T field at temperatures down to 3 mK. The aim of the project is to investigate low temperature transverse spin relaxation and possible spin diffusion anisotropy. Spin-echo and T1-type measurements were employed to measure the transverse and longitudinal spin diffusion coefficients. At high temperatures both spin diffusion coefficients are well explained assuming a quasiparticle interaction consistent with previous experiments. Conversely, at low temperatures the measured value of |λωτ| is apparently limited to about ten by a poorly-understood process that accelerates spin-echo decay. This hampers an accurate determination of the transverse diffusion coefficient at the lowest temperatures reached.

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Copyright information

© Plenum Publishing Corporation 2002

Authors and Affiliations

  • H. Akimoto
    • 1
    • 2
  • J. S. Xia
    • 1
  • E. D. Adams
    • 1
  • D. Candela
    • 2
  • W. J. Mullin
    • 2
  • N. S. Sullivan
    • 1
  1. 1.Microkelvin Laboratory, NHMFL and Physics DepartmentUniversity of Florida, GainesvilleUSA
  2. 2.Hasbrouck Laboratory, Department of PhysicsUniversity of MassachusettsAmherstUSA

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