The influence of high hydrostatic pressures on phase transitions temperature in ferroelectric crystals of (PbySn1−y)2P2(SexS1−x)6 family

The results of investigation of high hydrostatic pressure effect on the temperature of ferroelectric phase transitions in Sn 2 P 2 S 6 crystal and solid solutions on its base, and also on Sn 2 P 2 S 6 melting temperature are presented. The equations for determination of the temperature of ferroelect...

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Bibliographic Details
Published inFerroelectrics Vol. 192; no. 1; pp. 187 - 195
Main Authors Tyagur, Yu. I., Jun, J.
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.02.1997
Subjects
Ferroelectric phase transition
hydrostatic pressure
incommensurate phase
Lifshits point
phase diagram
tricritical point
triple point
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Summary:The results of investigation of high hydrostatic pressure effect on the temperature of ferroelectric phase transitions in Sn 2 P 2 S 6 crystal and solid solutions on its base, and also on Sn 2 P 2 S 6 melting temperature are presented. The equations for determination of the temperature of ferroelectric phase transitions in these materials have been obtained. The pressures determined by the p(x, y) plane equation have been found, that induce the splitting of the phase transition lines in (Pb y Sn 1−y ) 2 P 2 (Se x S 1−x ) 6 five-component crystals of ferroelectric solid solutions of substitution. The temperature hypersurface of T LT [P L (x L , y L )] points at which the splitting occurs (Lifshits hypersurface) has been established.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150199708216188