Journal of Low Temperature Physics

, Volume 126, Issue 1, pp 109–114

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

Authors

  • H. Akimoto
    • Microkelvin Laboratory, NHMFL and Physics DepartmentUniversity of Florida, Gainesville
    • Hasbrouck Laboratory, Department of PhysicsUniversity of Massachusetts
  • J. S. Xia
    • Microkelvin Laboratory, NHMFL and Physics DepartmentUniversity of Florida, Gainesville
  • E. D. Adams
    • Microkelvin Laboratory, NHMFL and Physics DepartmentUniversity of Florida, Gainesville
  • D. Candela
    • Hasbrouck Laboratory, Department of PhysicsUniversity of Massachusetts
  • W. J. Mullin
    • Hasbrouck Laboratory, Department of PhysicsUniversity of Massachusetts
  • N. S. Sullivan
    • Microkelvin Laboratory, NHMFL and Physics DepartmentUniversity of Florida, Gainesville
Article

DOI: 10.1023/A:1013775002939

Cite this article as:
Akimoto, H., Xia, J.S., Adams, E.D. et al. Journal of Low Temperature Physics (2002) 126: 109. doi:10.1023/A:1013775002939

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.

Copyright information

© Plenum Publishing Corporation 2002