Theory of intergranular magnetoresistance in nanometric manganites

被引：20

作者：

Ju, S ^{[1
]}

Yu, KW

Li, ZY

机构：

[1] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China

[2] Suzhou Univ, Dept Phys, Suzhou 215006, Peoples R China

[3] CCAST, World Lab, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.71.014416

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a self-consistent effective medium theory for the magnetotransport in nanometric manganites on the basis of the bond-disordered resistor network. The transport process here is assumed to be controlled by both the charging energies of grains and the spin-polarized tunneling through grain boundaries. The effects of network and band-bending at the grain boundaries on the magnetotransport are investigated. Our results are compared with the experiments on nanometric La2/3Sr1/3MnO3 and La2/3Ca1/3MnO3; good agreements are found.

引用

页数：8

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