Spin diffusion in liquid 3He confined in nafen

Abstract

We report results of spin diffusion measurements in normal phase of liquid 3He confined in nafen. Nafen is a new type of aerogel and it consists of Al2O3 strands which are nearly parallel to one another at macroscopic distances. We examine two samples of nafen with different porosities using spin echo techniques. Spin diffusion of 3He along and across the strands was measured. The aerogel alignment is clearly evident from observed spin diffusion anisotropy. A theory describing this effect is developed and compared with the experiment.

5 pages, 3 figures. Submitted to JETP Lett

References in corpus (4)

• Quartz Tuning Fork: Thermometer, Pressure- and Viscometer for Helium Liquids
• Phase diagram of superfluid 3He in "nematically ordered" aerogel
• Magnetization and Spin-Diffusion of Liquid 3He in Aerogel
• Anisotropic 2D Larkin-Imry-Ma state in polar distorted ABM phase of 3He in "nematically ordered" aerogel

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• Superfluid ${}^3$He in Planar Aerogel
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• Spin diffusion in liquid ${}^3$He confined in planar aerogel
• NMR shifts in ${}^3$He in aerogel induced by demagnetizing fields
• Effect of critical fluctuations on the spin transport in liquid He-3