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1999 | 96 | 3-4 | 409-416
Article title

Optical and Dilatometric Properties of (CH_{3})_{2}NH_{2}Al(SO_{4})_{2}·6H_{2}O Crystals in Paraelectric and Ferroelectric Phases

Content
Title variants
Languages of publication
EN
Abstracts
EN
Experimental investigation of the thermal linear expansion l(T) and temperature dependencies of the interference optical path difference D(T) were carried out for (CH_{3})_{2} NH_{2}Al(SO_{4})_{2}·6H_{2}O crystal, in the range of 120-310 K for three crystal physical directions. Decrease in electrostriction coefficients g of crystal was observed on approaching the phase transition point T_{c} ≈ 150 K in ferroelectric phase. Relative temperature changes of the lengthening δl/l and refractive index δn/(n-1) are of the same order of magnitude. Peculiarities of temperature dependence of dilatometric and optical parameters of (CH_{3})_{2}NH_{2}Al(SO_{4})_{2}·6H_{2}O testify for qualitative reconstruction of chemical bonds in the crystal when temperature changes in the same phase.
Keywords
EN
Publisher

Year
Volume
96
Issue
3-4
Pages
409-416
Physical description
Dates
published
1999-09
received
1999-03-22
Contributors
author
  • Institute of Experimental Physics, University of Wroclaw, Pl. M. Borna 9, 50-204 Wroclaw, Poland
author
  • Institute of Experimental Physics, University of Wroclaw, Pl. M. Borna 9, 50-204 Wroclaw, Poland
  • Faculty of Physics, Ivan Franko State University of L'viv, 8 Kyryla and Mefodiya Str., 290005 L'viv, Ukraine
  • Faculty of Physics, Ivan Franko State University of L'viv, 8 Kyryla and Mefodiya Str., 290005 L'viv, Ukraine
References
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv96z310kz
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