ELASTIC PROPERTIES OF THE LAYER-STRUCTURE MATERIAL (CH3NH3)2MNCL4

被引：16

作者：

GOTO, T ^{[1
]}

LUTHI, B ^{[1
]}

GEICK, R ^{[1
]}

STROBEL, K ^{[1
]}

机构：

[1] UNIV WURZBURG,INST PHYS,D-8700 WURZBURG,FED REP GER

来源：

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS | 1979年 / 12卷 / 08期

关键词：

D O I：

10.1088/0022-3719/12/8/001

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Measurements of various elastic constants for the layer-structure compound (CH3NH3)2MnCl4 are presented and anomalies are observed for some modes at the phase-transition temperatures. The c66 mode exhibits strong softening in the two tetragonal phases. A phenomenological free-energy model is presented which accounts for the different strain-order parameter coupling.

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页码：L303 / L307

页数：5

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