3He spin diffusion measurements in 3He- 4He mixture films
3He spin diffusion measurements for 3He-4He mixture films on Nuclepore are reported as a function of 3He coverage for 0. 030</=T</=0.070 K. We report measurements for a constant 4He coverage of 5.0 bulk density atomic layers, with 3He coverages between 0.10 and 0.98 layers. We find that the 3He spin diffusion coefficient, as measured by Hahn spin echoes, has an unexplained maximum as a function of 3He coverage and that the temperature dependence is somewhat weaker than predicted. Comparison measurements are presented for the NMR relaxation times T1 and T2 and the magnetization over the same 3He coverage range.
Sheldon
PA
Laboratory for Low Temperature Physics, Department of Physics, University of Massachusetts at Amherst, Amherst, Massachusetts 01003, USA.
Hallock
RB