Broadband dielectric spectroscopy of CuInP2Se6 crystals

被引：12

作者：

Macutkevic, Jan ^{[1
]}

Banys, Juras ^{[2
]}

Vysochanskii, Yulian ^{[3
]}

机构：

[1] Lithuania Acad Sci, Inst Semicond Phys, LT-2600 Vilnius, Lithuania

[2] Vilnius State Univ, Fac Phys, LT-10222 Vilnius, Lithuania

[3] Uzhgorod State Univ, Inst Solid State Phys & Chem, UA-88000 Uzhgorod, Ukraine

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2009年 / 206卷 / 01期

关键词：

PHASE-TRANSITION;

D O I：

10.1002/pssa.200824231

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Investigation results of broadband dielectric (from 20 Hz to 1.2 GHz) properties of layered CuInP2Se6 crystals are presented. The temperature dependence of the static dielectric permittivity reveals a ferroelectric phase transition at T-c = 225 K. In the paraelectric phase, at low frequencies, dielectric spectra are highly influenced by the high ionic conductivity with the activation energy of 3653.4 K (0.315 eV). In, the ferroelectric phase the electrical conductivity and its activation energy (531.1 K (0.045 eV)) are considerably smaller. The high-frequency part of the spectra is determined by a relaxational soft mode. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：167 / 172

页数：6

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