CMT121

Magnetization and Spin-Diffusion of Liquid ³He in Aerogel

• Author(s): J. A. Sauls, Yu. M. Bunkov, E. Collin, H. Godfrin and P. Sharma
• Date: August 23, 2004
• Journal: Phys. Rev. B 72, 024507 (2005) [DOI] [PDF]
• Abstract: We report theoretical calculations of the normal-state spin diffusion coefficient of ³He in aerogel, including both elastic and inelastic scattering of ³He quasiparticles, and compare these results with experimental data for ³He in 98% porous silica aerogel. This analysis provides a determination of the elastic mean free path within the aerogel. Measurements of the magnetization of the superfluid phase provide a test of the theory of pairbreaking and magnetic response of low-energy excitations in the ``dirty'' B-phase of ³He in aerogel. A consistent interpretation of the data for the spin-diffusion coefficient, magnetization and superfluid transition temperature is obtained by including correlation effects in the aerogel density.

• Comment: 7 pages with 9 figures

• Eprint: [PDF] [arXiv]

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