Cationic and charge segregation in La2/3Ca1/3MnO3 thin films grown on (001) and (110) SrTiO3

被引：35

作者：

Estrade, S. ^{[1
]}

Arbiol, J. ^{[1
]}

Peiro, F. ^{[1
]}

Infante, I. C. ^{[2
]}

Sanchez, F. ^{[2
]}

Fontcuberta, J. ^{[2
]}

de la Pena, F. ^{[3
]}

Walls, M. ^{[3
]}

Colliex, C. ^{[3
]}

机构：

[1] Univ Barcelona, Dept Elect, EME, CeRMAE,IN2UB, E-08028 Barcelona, CAT, Spain

[2] CSIC, Inst Ciencia Mat Barcelona, Bellaterra 08193, CAT, Spain

[3] Univ Paris 11, CNRS, Phys Solides Lab, UMR 8502, F-91405 Orsay, France

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 11期

关键词：

D O I：

10.1063/1.2981574

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Electron energy-loss spectroscopy is used to map composition and electronic states in epitaxial La(2/3)Ca(1/3)MnO(3) films grown on SrTiO(3) (001) and (110) substrates. It is found that in partially relaxed (110) films cationic composition and valence state of Mn(3+/4+) ions are preserved across the film thickness. In contrast, in fully strained (001) films, the Ca/La ratio gradually changes across the film, being La rich at film/substrate interface and La depleted at free surface; Mn valence state changes accordingly. These observations suggest that a strongly orientation-dependent adaptative composition mechanism dominates stress accommodation in manganite films and provides microscopic understanding of their dissimilar magnetic properties. (C) 2008 American Institute of Physics.

引用

页数：3

共 20 条

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