Anisotropy effects in thick layered CuInP2S6 and CuInP2Se6 crystals

被引：21

作者：

Dziaugys, Andrius ^{[1
]}

Banys, Juras ^{[1
]}

Macutkevic, Jan ^{[2
]}

Vysochanskii, Yulian ^{[3
]}

机构：

[1] Vilnius State Univ, Dept Radiophys, Fac Phys, LT-10222 Vilnius, Lithuania

[2] Ctr Phys Sci & Technol, Dept Optoelect, Vilnius, Lithuania

[3] Uzhgorod Univ, Dept Semicond Phys, Inst Solid State Phys & Chem, Uzhgorod, Ukraine

来源：

PHASE TRANSITIONS | 2013年 / 86卷 / 09期

关键词：

dielectric spectroscopy; ionic conductivity; ferrielectrics; FERRIELECTRIC-PARAELECTRIC TRANSITION; PHASE; SPECTROSCOPY;

D O I：

10.1080/01411594.2012.745533

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Results of broadband dielectric investigations of thick layered CuInP2S6 and CuInP2Se6 crystals in direction parallel and perpendicular to the layers are reported. No dielectric anomaly indicates spontaneous polarization appearance in the direction parallel to the layers in CuInP2S6 and CuInP2Se6 crystals. In this direction the dielectric dispersion is mostly caused by Maxwell-Wagner relaxation and ionic conductivity. The typical for ferroelectric phase transition dielectric anomaly is observed only in the direction perpendicular to the layers in both crystals. The activation energy of DC conductivity is much higher in the direction perpendicular to the layers, which confirms ionic nature of electrical conductivity in both crystals.

引用

页码：878 / 885

页数：8

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