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NMR Study of Disordered Inclusions in the Quenched Solid Helium

NMR Study of Disordered Inclusions in the Quenched Solid Helium Phase structure of rapidly quenched solid helium samples is studied by the NMR technique on dilute 3He–4He mixtures. The pulse NMR method is used for measurements of spin–spin T 2 relaxation time and spin diffusion coefficient D for all coexisting phases. It was found that quenched samples are two-phase systems consisting of the hcp matrix and some inclusions which are characterized by D and T 2 values close to those in liquid phase. Such liquid-like inclusions undergo a spontaneous transition to a new state with anomalously short T 2 times. It is found that inclusions observed in both the states disappear on careful annealing near the melting curve. It is assumed that the liquid-like inclusions transform into a new state—a glass or a crystal with a large number of dislocations. These disordered inclusions may be responsible for the anomalous phenomena observed in supersolid region. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

NMR Study of Disordered Inclusions in the Quenched Solid Helium

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References (1)

Publisher
Springer Journals
Copyright
Copyright © 2012 by Springer Science+Business Media, LLC
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/s10909-012-0641-4
Publisher site
See Article on Publisher Site

Abstract

Phase structure of rapidly quenched solid helium samples is studied by the NMR technique on dilute 3He–4He mixtures. The pulse NMR method is used for measurements of spin–spin T 2 relaxation time and spin diffusion coefficient D for all coexisting phases. It was found that quenched samples are two-phase systems consisting of the hcp matrix and some inclusions which are characterized by D and T 2 values close to those in liquid phase. Such liquid-like inclusions undergo a spontaneous transition to a new state with anomalously short T 2 times. It is found that inclusions observed in both the states disappear on careful annealing near the melting curve. It is assumed that the liquid-like inclusions transform into a new state—a glass or a crystal with a large number of dislocations. These disordered inclusions may be responsible for the anomalous phenomena observed in supersolid region.

Journal

Journal of Low Temperature Physics – Springer Journals

Published: Jun 7, 2012

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