Charge/orbital ordering in perovskite manganites

被引：56

作者：

Tomioka, Y

Okuda, T

Okimoto, Y

Asamitsu, A

Kuwahara, H

Tokura, Y

机构：

[1] JRCAT, Tsukuba, Ibaraki 3050046, Japan

[2] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 326卷 / 1-2期

关键词：

charge/orbital ordering; perovskite manganites;

D O I：

10.1016/S0925-8388(01)01222-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have studied the phenomena relevant to charge/orbital ordering in perovskite manganites. In the three bandwidth controlled systems, La-0.7(Sr1-yCay)(0.3)MnO3 (x=0.3), (Nd1-ySmy)(0.55)Sr0.45MnO3 (x=0.45), and Pr-0.65(Sr1-yCay)(0.35)MnO3 (x=0.35), the variation of the magnetic and electronic properties with y has been studied as the hole doping level is kept constant. As y increases (the effective one-electron bandwidth decreases), the colossal magnetoresistance (CMR) or charge /orbital ordering appears. That is, the CMR is caused by competition between double exchange and charge/orbital ordering. As another issue, the electronic and magnetic properties of the ordered double perovskite Sr2FeMoO6 (T(C)similar to 420 K) have been studied by utilizing single crystals. (C) 2001 Elsevier Science BY. All rights reserved.

引用

页码：27 / 35

页数：9

共 58 条

[1] CONSIDERATIONS ON DOUBLE EXCHANGE [J].