Critical indices of the ferroelectric phase transition in TGS crystals
Temperature dependencies of retardation, electron susceptibility and linear thermal expansion for three crystal-physic directions are obtained by means of optical investigations of the ferroelectric phase transition in TGS crystal using the James-type interferometer. Temperature dependencies of t...
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| Date: | 1999 |
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| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Published: |
Інститут фізики конденсованих систем НАН України
1999
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| Series: | Condensed Matter Physics |
| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/120540 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Critical indices of the ferroelectric phase transition in TGS crystals / O. Myshchyshyn, B. Andriyevsky, M. Romanyuk // Condensed Matter Physics. — 1999. — Т. 2, № 3(19). — С. 509-514. — Бібліогр.: 6 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | Temperature dependencies of retardation, electron susceptibility and linear thermal expansion for three crystal-physic directions are obtained by
means of optical investigations of the ferroelectric phase transition in TGS
crystal using the James-type interferometer. Temperature dependencies of
the spontaneous changes of the characteristics studied in the 39–49◦ C
range are fitted by the power low Y ~ τ²β with double critical indices
2β=0.87–0.95. Difference of 2β values from the unity is explained by the
essential temperature dependence in the range close to the phase transition point for the coefficients of electrooptic, reversed piezoelectric and
electrostriction effects. |
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