Anisotropic spin diffusion in liquid He confined in nafen.
- Resource Type
- Article
- Authors
- Dmitriev, V.; Melnikovsky, L.; Senin, A.; Soldatov, A.; Yudin, A.
- Source
- JETP Letters. Jun2015, Vol. 101 Issue 12, p808-813. 6p.
- Subject
- *ANISOTROPY
*NUCLEAR spin
*LIQUID helium
*AEROGELS
*POROSITY
- Language
- ISSN
- 0021-3640
We report results of spin diffusion measurements in normal phase of liquid He confined in nafen. Nafen is a new type of aerogel and it consists of AlO 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 He along and across the strands was measured. The aerogel alignment is evident from observed spin diffusion anisotropy. A theory describing this effect is developed and compared with the experiment. [ABSTRACT FROM AUTHOR]