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2007 | 112 | 3 | 549-556
Article title

The Dielectric Studies of Ferroelectric [NH_2(CH_3)_2]_3Sb_2Cl_9 Crystals under Moderate Pressure

Content
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Languages of publication
EN
Abstracts
EN
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.
Keywords
Year
Volume
112
Issue
3
Pages
549-556
Physical description
Dates
published
2007-09
received
2007-08-24
(unknown)
2007-09-20
References
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv112n307kz
Identifiers
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