Electrical conductivity and magnetic behavior of La0.67Ca0.33MnO3 as influenced by substitution of Co

被引：21

作者：

Ganguly, R ^{[1
]}

Gopalakrishnan, IK ^{[1
]}

Yakhmi, JV ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Div Chem, Mumbai 400085, India

来源：

PHYSICA B | 1999年 / 266卷 / 04期

关键词：

colossal magnetoresistance; hole doped manganates; magnetic anisotropy; metal-insulator transition; double exchange interaction; domain wall pinning; hysteresis;

D O I：

10.1016/S0921-4526(99)00060-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

La0.67Ca0.33Mn1-xCoxO3 (x = 0.00 0.05, 0.075, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35 0.40) have been investigated by AC susceptibility, DC magnetization and DC electrical resistivity measurements. Substitution of Co for Mn did not cause any change in crystal symmetry, yet electrical conductivity as well as ferromagnetism have been consistently suppressed by the dopant. The results can be explained on the basis of weakening of the double exchange process and an increase in anisotropy of the exchange interaction consequent upon Co doping. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：332 / 339

页数：8

共 34 条

[1] Magnetic properties and colossal magnetoresistance of La(Ca)MnO3 materials doped with Fe [J].