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2001 | 99 | 5 | 593-600
Article title

Simultaneous Pyroelectric and Dilatometric Studies of Phase Transitions in Triglycine Sulphate and Glycine Posphite Crystals

Content
Title variants
Languages of publication
EN
Abstracts
EN
Temperature dependences of the linear dimension L(T) and spontaneous polarization P_s(T) for triglycine sulphate and glycine posphite single crystals have been measured in the same run of temperature. A decrease in the spontaneous electrostriction coefficient Q_L of both crystals studied is displayed when approaching the corresponding phase transition point T_c. A temperature dependence of the coefficients Q_L(T) shows that the rates of temperature changes of displacement of the atomic complexes of corresponding crystal structure forming the square of spontaneous polarization P_s^2 (primary order parameter) and the displacements of all atomic complexes forming the spontaneous linear thermal expansionδ L_s/L (secondary order parameter) are different. The applying external electric field E=3×10 ^5 V/m to triglycine sulphate crystal does not influence essentially the temperature dependence of Q_L(T) in the temperature range of phase transition below T_c.
Keywords
EN
Publisher

Year
Volume
99
Issue
5
Pages
593-600
Physical description
Dates
published
2001-05
received
2000-11-03
received
2001-02-05
Contributors
  • The Ivan Franko National University of L'viv, 8 Kyrylo & Mefodii Str., 79005 L'viv, Ukraine
author
  • The Ivan Franko National University of L'viv, 8 Kyrylo & Mefodii Str., 79005 L'viv, Ukraine
author
  • Institute of Experimental Physics, University of Wrocław, 9 M. Born Sqr., 50-204 Wrocław, Poland
author
  • Institute of Experimental Physics, University of Wrocław, 9 M. Born Sqr., 50-204 Wrocław, Poland
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv99n507kz
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