FERROELASTIC PHASE-TRANSITION IN K3NA(CRO4)2 - BRILLOUIN-SCATTERING STUDIES AND THEORETICAL MODELING

被引：21

作者：

MROZ, B

KIEFTE, H

CLOUTER, MJ

TUSZYNSKI, JA

机构：

[1] MEM UNIV NEWFOUNDLAND,DEPT PHYS,ST JOHNS A1B 3X7,NEWFOUNDLAND,CANADA

[2] UNIV ALBERTA,DEPT PHYS,EDMONTON T6G 2H7,ALBERTA,CANADA

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.43.641

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For K3Na(CrO4)2, Brillouin shifts related to elastic constants have been measured in the range of temperatures between 140 and 300 K. All modes have been affected, to various degrees, by the 2/m --> 3BAR(m) transition at about 231 K. A Landau model has been proposed in order to provide a qualitative description of the ferroelastic transition. It is argued that it is a weakly first-order transition.

引用

页码：641 / 648

页数：8

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