OBSERVATION OF RAPID ATOMIC MOTION IN SOLID HE-3-HE-4 MIXTURES USING NMR

Authors
SCHUSTER I SWIRSKY Y SCHMIDT EJ POLTURAK E LIPSON SG
Citation
I. Schuster et al., OBSERVATION OF RAPID ATOMIC MOTION IN SOLID HE-3-HE-4 MIXTURES USING NMR, Europhysics letters, 33(8), 1996, pp. 623-628
Citations number
17
Categorie Soggetti
Physics
Journal title
Europhysics letters → ACNP
ISSN journal
02955075
Volume
33
Issue
8
Year of publication
1996
Pages
623 - 628
Database
ISI
SICI code
0295-5075(1996)33:8<623:OORAMI>2.0.ZU;2-8
Abstract
We compared liquid and solid He-3-He-4 mixtures at coexistence using N MR imaging of the density of He-3 and of the T-2 relaxation time in th e two phases. We find that above 1K, He-3 atoms in a bcc solid are mor e mobile than in the superfluid liquid. This rapid motion, induced by vacancies, takes place on a microscopic scale and can be explained in terms of He-3-vacancy attraction of quantum origin. We relate our obse rvations to similar effects observed in Sn-Pb alloys.