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Other articles in this issue
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The domain structure of the Rb2Cd2(SO4)3
and Tl2Cd2(SO4)3 langbeinite
crystals
2. The domain structure in the ferroelectric-ferroelastic
phases of the Rb2Cd2(SO4)3
crystals
Vlokh R., Skab I., Girnyk I., *Czapla Z., *Dacko S., *Kosturek B.
Institute of Physical Optics, 79005, 23 Dragomanov Str.,
L’viv, Ukraine
*Institute of Experimental Physics, Wroclaw University,
9 M.Born Sq., Wroclaw,Poland
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The temperature behavior of the domain structure in the ferroelectric-ferroelastic
phases of the Rb2Cd2(SO4)3
langbeinite crystals were investigated by the optical microscopy method.
The new phase with the point group of symmetry 3 was found in the temperature
region 130K<T<113K. By the observation of the domain structure in
the temperature region 113K<T<101K the coexistence of the monoclinic
and trigonal phase was revealed. The broad maximum of the dielectric permitivity
measured at frequency 1MHz around T=Tc4=113K was found. This
maximum significate that phase transition at Tc4 is the diffuse
phase transition
Key words: Rb2Cd2(SO4)3
, langbeinite crystals, domain structure, dielectric permitivity, phase
transition
doi: 10.3116/16091833/1/2/103/2000 |
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