COPPER ORDERING IN LAMELLAR CuMP2S6 (M=Cr, In): TRANSITION TO AN ANTIFERROELECTRIC OR FERROELECTRIC PHASE

被引：41

作者：

Cajipe, V. B. ^{[1
]}

Ravez, J. ^{[2
]}

Maisonneuve, V. ^{[1
]}

Simon, A. ^{[2
]}

Payen, C. ^{[1
]}

Von der Muhll, R. ^{[2
]}

Fischer, J. E. ^{[3
]}

机构：

[1] CNRS, UMR 110, Inst Mat, F-44072 Nantes 03, France

[2] Inst Chim Mat Condensee Bordeaux, F-33600 Pessac, France

[3] Univ Penn, Res Struct Matter Lab, Philadelphia, PA 19104 USA

来源：

FERROELECTRICS | 1996年 / 185卷

关键词：

D O I：

10.1080/00150199608210497

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The transition to an antiferroelectric or ferroelectric phase in the lamellar compound CuMP2S6 (M =Cr or In) is shown to be triggered by the appearance of an ordered copper sublattice. Cu(I) ions in CuCrP2S6, which are distributed over several sites at room temperature, freeze into an intermediate quasi-antipolar state between 190 and 175K, and then form an array of alternating up and down dipoles below 150K. Evidence for these transitions were obtained using calorimetry, diffraction and electric permittivity measurements. CuInP2S6 at 298K contains antiparallel polar sublattices of Cu(I) and In(III) which yield a P-s = 2.6 mu C-cm(-2), as calculated from crystallographic results. The existence of copper disorder and the central octahedral location of In(III) in the paraelectric phase (T>315K) were also confirmed.

引用

页码：135 / 138

页数：4

共 5 条

[1] STRUCTURAL ASPECTS AND MAGNETIC-PROPERTIES OF THE LAMELLAR COMPOUND CU0.50CR0.50PS3
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