Magnetoresistance effect in layered-perovskite La2-2xCa1+2xMn2O7 thin films

被引：13

作者：

Asano, H

Hayakawa, J

Matsui, M

机构：

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1997年 / 36卷 / 2A期

关键词：

magnetoresistance; ferromagnetic thin film; manganese oxide; Sr3Ti2O7-type perovskite;

D O I：

10.1143/JJAP.36.L104

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ferromagnetic thin films of La2-2xCa1+2xMn2O7 (x=0.3) with a tetragonal Sr3Ti2O7-type layered perovskite structure have been deposited on MgO and SrTiO3 (001) substrates by magnetron sputtering. The epitaxial thin films in this study have the a-axis normal orientation with 90 degrees domains having the a/c boundaries in the film plane. These thin films exhibit highly enhanced magnetoresistance (MR) effects (MR ratio Delta rho/rho(0) of -93% at mu(0)H=1T) compared with those reported for thin films of cubic ferromagnetic perovskite with isotropic Mn-O networks. These MR behavior can be explained by taking account of the two-dimensionality and anisotropy of the Mn-O networks in the ferromagnetic layered perovskites.

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收藏

页码：L104 / L106

页数：3

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