Observation of magnetic domain structure in phase-separated manganites by Lorentz electron microscopy

被引：22

作者：

Mori, S ^{[1
]}

Asaka, T

Matsui, Y

机构：

[1] Univ Osaka Prefecture, CIAS, Dept Mat Sci, Sakai, Osaka 5998531, Japan

[2] JST, PRESTO, Kawaguchi, Japan

[3] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan

[4] Waseda Univ, Sch Educ, Tokyo 1698085, Japan

来源：

JOURNAL OF ELECTRON MICROSCOPY | 2002年 / 51卷 / 04期

关键词：

Lorentz microscopy; magnetic domains; colossal magnetoresistance; phase separation; manganites;

D O I：

10.1093/jmicro/51.4.225

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Magnetic domain structure in manganites was investigated by Lorentz electron microscopy, in order to understand some unusual physical properties, such as a colossal magnetoresistance (CMR) effect and a metal-to-insulator (MI) transition. In Particular, we examined the spatial distribution of the charge/orbital ordered (CO/OO) insulator state and the ferromagnetic (FM) metallic state in phase-separated manganites, (La5/8-xPrx)Ca3/8MnO3 for x = 0.375, by obtaining both the dark-field and Lorentz images. We found an unusual coexistence of the CO/OO and FM metallic states with micrometer size below a MI transition temperature of 60 K. Our experimental findings provide direct evidence of the phase separation found in CMR manganites.

引用

页码：225 / 229

页数：5

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