Variation of charge-orbital correlation with Cr doping in manganites

被引：64

作者：

Kimura, T ^{[1
]}

Kumai, R

Okimoto, Y

Tomioka, Y

Tokura, Y

机构：

[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[2] Joint Res Ctr Atom Technol, Tsukuba, Ibaraki 3050046, Japan

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.62.15021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The stability of charge-orbital ordering in a colossal magnetoresistance (CMR) manganite can be varied to a large extent by doping of Cr impurities on the Mn site. Most of the generic features seen in the CMR manganites, such as the submicrometric phase separation into metallic and insulating states, a resistivity-enhanced paramagnetic state, and related CMR effect, can be generated successively with Cr doping in Nd1/2Ca1/2MnO3 crystal. Systematic studies of the Cr-doped crystals by measurements of magnetotransport and x-ray diffraction have shown that the incommensurate charge-orbital-ordered state turns into the dynamic and short-range charge-orbital correlation that is the origin of the high-resistive state exhibiting CMR.

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页码：15021 / 15025

页数：5

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