GIANT MAGNETORESISTANCE IN LA1-XSRXMNOZ FILMS NEAR ROOM-TEMPERATURE

被引：481

作者：

JU, HL ^{[1
]}

KWON, C ^{[1
]}

LI, Q ^{[1
]}

GREENE, RL ^{[1
]}

VENKATESAN, T ^{[1
]}

机构：

[1] UNIV MARYLAND,DEPT ELECT ENGN,COLLEGE PK,MD 20742

来源：

APPLIED PHYSICS LETTERS | 1994年 / 65卷 / 16期

关键词：

D O I：

10.1063/1.112808

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the observation of giant magnetoresistance near room temperature in ferromagnetic films of La1-xSr(x)MnO(z) for 0.16 less-than-or-equal-to x less-than-or-equal-to 0.33. For B = 5 T, the maximum magnetoresistance ratio [R(0) - R(B)]/R(0) of an annealed film is 60% at 260 K for x = 0.2, and 35% at 330 K for x = 0.33. Annealed films have higher Curie temperature (T(c)), a larger saturation moment and a larger magnetoresistance effect near T(c) than do as-grown films. The temperature dependence of resistivity for all the samples investigated is unusual, activated above T(c) and metallic below T(c). This and the giant magnetoresistance are possibly explained by scattering from magnetic polarons which dominate the transport near T(c). (C) 1994 American Institute of Physics.

引用

页码：2108 / 2110

页数：3

共 17 条

[1] MAGNETORESISTANCE IN MAGNETIC MANGANESE OXIDE WITH INTRINSIC ANTIFERROMAGNETIC SPIN STRUCTURE [J].