Competing instabilities and metastable states in (Nd, Sm)(1/2)Sr1/2MnO3

被引：287

作者：

Tokura, Y ^{[1
]}

Kuwahara, H ^{[1
]}

Moritomo, Y ^{[1
]}

Tomioka, Y ^{[1
]}

Asamitsu, A ^{[1
]}

机构：

[1] UNIV TOKYO, DEPT APPL PHYS, TOKYO 113, JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.76.3184

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Competition between the ferromagnetic double-exchange interaction and the antiferromagnetic charge-ordering instability gives rise to thermally as well as magnetic field (H) induced insulator-metal transitions in distorted perovskites (Nd1-ySmy)(1/2)Sr1/2MnO3 with a controlled one-electron bandwidth. A systematic study on the metal-insulator phase diagram in the T-H plane with varying y as well as a high-pressure study has revealed the metastable nature of the undercooled ferromagnetic metallic state.

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页码：3184 / 3187

页数：4

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