Reversible strain effect on the magnetization of LaCoO3 films

被引：92

作者：

Herklotz, A. ^{[1
]}

Rata, A. D. ^{[1
]}

Schultz, L. ^{[1
]}

Doerr, K. ^{[1
]}

机构：

[1] Inst Metall Mat, IFW Dresden, D-01069 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 09期

关键词：

Curie temperature; ferromagnetic materials; internal stresses; lanthanum compounds; magnetic moments; magnetic thin films; magnetisation; magnetomechanical effects;

D O I：

10.1103/PhysRevB.79.092409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetization (M) of a LaCoO3 film grown epitaxially on a piezoelectric substrate has been investigated in dependence on the biaxial in-plane strain. M decreases with the reversible release of tensile strain, with a maximum change of at least 6% per 0.1% of biaxial strain near the Curie temperature (T-C). The biaxial strain response of T-C is estimated to be below 5 K/% in the tensile strain state. This is in agreement with results from statically strained films on various substrates. As possible origins of the strain-induced magnetization are considered (i) the strain-dependent Curie temperature, (ii) a strain-dependent magnetically inhomogeneous (phase-separated) state, and (iii) a strain-dependent magnetic moment (spin state) of Co ions. The T-C shift is found insufficient to explain the measured strain-induced magnetization change but contributions from mechanism (ii) or (iii) must be involved.

引用

页数：4

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