GIANT NEGATIVE MAGNETORESISTANCE IN PEROVSKITELIKE LA2/3BA1/3MNOX FERROMAGNETIC-FILMS

被引：3994

作者：

VONHELMOLT, R ^{[1
]}

WECKER, J ^{[1
]}

HOLZAPFEL, B ^{[1
]}

SCHULTZ, L ^{[1
]}

SAMWER, K ^{[1
]}

机构：

[1] UNIV AUGSBURG,INST PHYS,W-8900 AUGSBURG,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.71.2331

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

At room temperature a large magnetoresistance, DELTAR/R(H=0), of 60% has been observed in thin magnetic films of perovskitelike La-Ba-Mn-O. The films were grown epitaxially on SrTiO3 substrates by off-axis laser deposition. In the as-deposited state, the Curie temperature and the saturation magnetization were considerably lower compared to bulk samples, but were increased by a subsequent heat treatment. The samples show a drop in the resistivity at the magnetic transition, and the existence of magnetic polarons seems to dominate the electric transport in this region.

引用

页码：2331 / 2333

页数：3

共 18 条

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