Article

Journal of Low Temperature Physics

, Volume 126, Issue 1, pp 109-114

First online:

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

  • H. AkimotoAffiliated withMicrokelvin Laboratory, NHMFL and Physics Department, University of Florida, GainesvilleHasbrouck Laboratory, Department of Physics, University of Massachusetts
  • , J. S. XiaAffiliated withMicrokelvin Laboratory, NHMFL and Physics Department, University of Florida, Gainesville
  • , E. D. AdamsAffiliated withMicrokelvin Laboratory, NHMFL and Physics Department, University of Florida, Gainesville
  • , D. CandelaAffiliated withHasbrouck Laboratory, Department of Physics, University of Massachusetts
  • , W. J. MullinAffiliated withHasbrouck Laboratory, Department of Physics, University of Massachusetts
  • , N. S. SullivanAffiliated withMicrokelvin Laboratory, NHMFL and Physics Department, University of Florida, Gainesville

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

We report preliminary results for pulsed-NMR measurements on a very dilute 3 He- 4 He mixture (x 3 =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.