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Microwave dielectric properties of TlSbSe2crystals

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
82
Issue
8
Identifiers
DOI: 10.1016/0038-1098(92)90114-o

Abstract

Abstract The dielectric properties of TlSbSe 2 have been studied at microwaves in a wide temperature region. It is shown that the crystal possesses a high and anisotropic dielectric permittivity caused by phonons contribution. The temperature dependence of the dielectric permittivity in the polar direction according to the Curie-Weiss law with the negative Curie temperature shows that TlSbSe 2 is a virtual ferroelectric. Between 4.2 and 700 K the crystal has a sequence of structural phase transitions, including the phase transition to a supposed incommensurate and superionic phase. The phase transition cause anomalies of the permittivity and electric conductivity of the crystal.

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