Correlation between magnetovolume and giant magnetoresistance effects in doped La2/3Ca1/3MnO3 perovskites

被引：20

作者：

DeTeresa, JM ^{[1
]}

Blasco, J ^{[1
]}

Ibarra, MR ^{[1
]}

Garcia, J ^{[1
]}

Marquina, C ^{[1
]}

Algarabel, P ^{[1
]}

delMoral, A ^{[1
]}

机构：

[1] UNIV ZARAGOZA, CSIC, INST CIENCIA MAT ARAGON, E-50009 ZARAGOZA, SPAIN

来源：

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

关键词：

D O I：

10.1063/1.361544

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

La0.62Tb0.05Ca0.33MnO3 and La0.6Y0.07Ca0.33MnO3 have been studied in order to probe into the mechanisms responsible for the giant magnetoresistance ratios observed in this kind of compound. The experiments have shown a strong connection between the magnetotransport and magnetovolume properties. A large volume effect appears above T-c which collapses with applied magnetic field or when the long range magnetic order sets in. Above T-c the magnetostriction and magnetoresistance isotherms are highly correlated. Charge localization with local distortion appears to be responsible for the transport and volume properties at zero held. Charge mobility and a more normal volume dependence on temperature are restored by applying high enough magnetic fields. (C) 1996 American Institute of Physics.

引用

页码：5175 / 5177

页数：3

共 12 条

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