Electrical conductivity in ferromagnetic perovskite structures

被引：38

作者：

Zhang, SF

机构：

[1] Department of Physics, New York University, New York

来源：

JOURNAL OF APPLIED PHYSICS | 1996年 / 79卷 / 08期

关键词：

D O I：

10.1063/1.361717

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A spin-polaron Hamiltonian is proposed to study the electrical conductivity in perovskite structures. A crossover from the metallic conduction at low temperatures to the hopping-type conduction at high temperature is calculated within the proposed model Hamiltonian. It is found that most of the experimental observations on resistivity and colossal magnetoresistance can be well explained with the assumption of the existence of spin clusters. (C) 1996 American Institute of Physics.

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页码：4542 / 4544

页数：3

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