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Abstracts
The effect of pressure on the dielectric properties of [NH_2(CH_3)_2]_3Sb_2Cl_9 crystal was analyzed for a few values of hydrostatic pressure within the range from 0.1 MPa to 300 MPa and for temperatures from the range of 220-350 K. The measuring frequency was 1 kHz. The pressure-temperature phase diagram obtained was nonlinear. The temperature dielectric permittivity anomalies related to the paraelectric-ferroelectric phase transition temperature (T_c) gradually increase up to 66 MPa and then decrease with subsequent increase in pressure. The character of the temperature dielectric permittivity anomalies, typical of the continuous ferroelectric transition, remains unchanged with increasing pressure. Additionally, the pressure dependences of the Curie-Weiss constants for the crystal in paraelectric (C_+) and ferroelectric (C_-) phases were evaluated and discussed. The results indicated a complex mechanism of the ferroelectric phase transition.
Discipline
Journal
Year
Volume
Issue
Pages
549-556
Physical description
Dates
published
2007-09
received
2007-08-24
(unknown)
2007-09-20
Contributors
author
- Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
author
- Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
author
- Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
author
- Faculty of Chemistry, Wrocław University, Joliot-Curie 14, 50-385 Wrocław, Poland
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Document Type
Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv112n307kz