Dielectric measurement study of lamellar CuInP2Se6:: successive transitions towards a ferroelectric state via an incommensurate phase?

被引：37

作者：

Vysochanskii, YM

Molnar, AA

Gurzan, MI

Cajipe, VB

Bourdon, X

机构：

[1] Uzhgorod State Univ, Inst Solid State Phys & Chem, UA-294000 Uzhgorod, Ukraine

[2] Inst Mat Jean Rouxel, F-44322 Nantes 3, France

来源：

SOLID STATE COMMUNICATIONS | 2000年 / 115卷 / 01期

关键词：

ferroelectrics; dielectric response; phase transitions;

D O I：

10.1016/S0038-1098(00)00131-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The dielectric properties of lamellar CuInP2Se6 are studied as a function of temperature. Two phase transitions are detected: a second-order one at T-i = 248 K and a first-order transition at T-c = 236 K. These observations confirm the assumed paraelectric and ferroelectric character of the high- and low-temperature phases and give the first indication of an intermediate dipole state existing in this material. The hypothesis of an incommensurate phase occurring between T-i and T-c and the possible appearance of a Lifshitz point in CuInP2(SexS1-x)(6) are discussed. (C) 2000 Published by Elsevier Science Ltd. All rights reserved.

引用

页码：13 / 17

页数：5

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