Features of the rhombohedral-to-orthorhombic structural phase transition in La1-xSrxMnO3

被引：11

作者：

Arao, M

Koyama, Y

Inoue, Y

Moritomo, Y

机构：

[1] Waseda Univ, Kagami Mem Lab Mat Sci & Technol, Shinjuku Ku, Tokyo 1690051, Japan

[2] Waseda Univ, Dept Mat Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan

[3] Nissan ARC Ltd, Dept Res, Struct Anal Sect, Kanagawa 2370061, Japan

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.62.5399

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The R (3) over bar c-to-Pbnm structural phase transition in La1-xSrxMnO3, which is characterized by changes in the rotational displacement of the MnO6 octahedra and in the crystal system, has been investigated by transmission electron microscopy. The experimental data indicate that the former change results in the appearance of the antiphase boundary and the latter produces the {110} and {112} twin structures. In addition, the structural phase transition can be reproduced on the basis of the Landau theory, in which a normal structure and an order parameter no, respectively, assumed to be the Pm3m structure and normal coordinates of the rotational displacements.

引用

页码：5399 / 5405

页数：7

共 10 条

[1] Features of crystal structures in the correlated-electron system Sr1-xLaxTiO3 [J].