Colossal magnetoresistance and relaxation phenomena

被引：11

作者：

Fisher, LM

Kalinov, AV

Savel'ev, SE

Voloshin, IF

Balbashov, AM

机构：

[1] All Russian Elect Engn Inst, Moscow 111250, Russia

[2] Moscow Power Engn Inst, Moscow 105835, Russia

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1998年 / 10卷 / 43期

关键词：

D O I：

10.1088/0953-8984/10/43/021

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The magnetization and magnetoresistance of La(1-x)A(x)MnO(3) (A = Sr, Ca) single crystals have been studied in the static regime. The same characteristics have been investigated as functions of time in response to a sharp change of the magnetic field, The magnetic moment M, dynamic magnetic susceptibility chi', and resistivity rho are found to relax noticeably in the samples with A = Sr (x = 0.3, 0.35). These parameters are shown to relax approximately logarithmically over time. The relaxation is temperature dependent, and diminishes when the temperature is far from that of the magnetic transition. The resistivity and magnetization do not relax when the field direction is reversed instantaneously. The static and relaxation properties observed are interpreted in the framework of a simple phenomenological model.

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收藏

页码：9769 / 9782

页数：14

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