V. V. Dmitriev, L. A. Melnikovsky, A. A. Senin, A. A. Soldatov, A. N. Yudin, “Anisotropic spin diffusion in liquid <nobr>$^3$</nobr>He confined in nafen”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2015, Volume 101, Issue 12,Pages <nobr>908

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Anisotropic spin diffusion in liquid $^3$He confined in nafen

V. V. Dmitriev^a, L. A. Melnikovsky^a, A. A. Senin^a, A. A. Soldatov^ab, A. N. Yudin^a

^a Kapitza Institute for Physical Problems of the RAS, 119334 Moscow, Russia
^b Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia

Abstract: We report results of spin diffusion measurements in normal phase of liquid $^3$He confined in nafen. Nafen is a new type of aerogel and it consists of Al$_2$O$_3$ 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 $^3$He 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.

Received: 15.05.2015

Language: English

DOI: 10.7868/S0370274X15120073