Fast Diffusion Process in Quenched hcp Dilute Solid 3He–4He Mixture

The study of phase structure of dilute 3 He– 4 He solid mixtures of differing quality is performed by the spin echo NMR technique. The diffusion coefficient is determined for each coexistent phase. Two diffusion processes are observed in rapidly quenched (non-equilibrium) hcp samples: the first proc...

Full description

Saved in:
Bibliographic Details
Published in:Journal of low temperature physics 2010-02, Vol.158 (3-4), p.496-501
Main Authors: Vekhov, Y. O., Birchenko, A. P., Mikhin, N. P., Rudavskii, E. Y.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Close packed lattices
Condensed Matter Physics
Crystals
Diffusion
Diffusion coefficient
Diffusion rate
Hexagonal cells
Inclusions
Magnetic Materials
Magnetism
Physics
Physics and Astronomy
Quenching (cooling)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The study of phase structure of dilute 3 He– 4 He solid mixtures of differing quality is performed by the spin echo NMR technique. The diffusion coefficient is determined for each coexistent phase. Two diffusion processes are observed in rapidly quenched (non-equilibrium) hcp samples: the first process has a diffusion coefficient corresponding to hcp phase and the second one has huge diffusion coefficient corresponding to liquid phase, which is evidence of liquid-like inclusions formation during fast crystal growing. It is established that these inclusions disappear in equilibrium crystals after careful annealing.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-009-0022-9