Low Temperature Physics: 33, 578 (2007); https://doi.org/10.1063/1.2755184 (6 pages)
Fizika Nizkikh Temperatur: Volume 33, Number 6-7 (June 2007), p. 758-764    ( to contents , go back )

Thermodynamics and microstructure of vacancies in rare gas crystals at high temperature

A.I. Karasevskii and V.V. Lubashenko

G.V. Kurdyumov Institute for Metal Physics, 36 Vernadsky Str., Kiev 03142, Ukraine
E-mail: akaras@imp.kiev.ua
pos Анотація:

Received September 7, 2006

Abstract

A self-consistent statistical method is used to calculate the Gibbs free energy of vacancy formation in heavy rare gas crystals at high temperature. It is shown that the vacancy formation free energy rapidly falls in the vicinity of the melting point of the crystal. Such behavior is attributed to approaching the anharmonic instability point of vibrational subsystem of the solid.

PACS: 61.72.Bb Theories and models of crystal defects;
PACS: 61.72.Ji Point defects (vacancies, interstitials, color centers, etc.) and defect clusters;
PACS: 64.70.Dv Solid-liquid transitions.

Key words: vacancy formation, rare gas crystals.

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