Positive magnetoresistance effect in rare earth cobaltites

被引：0

作者：

I. O. Troyanchuk

M. V. Bushinskii

D. V. Karpinsky

V. M. Dobryanskii

V. V. Sikolenko

A. M. Balagurov

机构：

[1] National Academy of Sciences of Belarus,Scientific and Practical Materials Research Center

[2] Tank Belarus State Pedagogical University,undefined

[3] Joint Institute of Nuclear Research,undefined

来源：

JETP Letters | 2009年 / 89卷

关键词：

75.47.De; 75.50.-y; 77.80.Bh;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The structure, magnetic, and magnetotransport properties of the Pr0.5Sr0.5Co1 − xFexO3 system have been studied. The ferromagnet-spin glass (x = 0.5)-G-type antiferromagnet (x = 0.7) transitions and the metal—insulator transitions (x = 0.25) have been revealed. It has been established that the magnetoresistance of the metallic ferromagnetic cobaltites changes sign from positive to negative as the external magnetic field increases. The positive component increases and the negative component decreases with decreasing temperature. The negative magnetoresistance increases sharply in the insulating spinglass phase. Possible causes of the low-magnetic-field positive magnetoresistance in the rare earth metallic cobaltites are discussed.

引用

页码：319 / 323

页数：4

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