Electronic and Magnetic Reconstructions in La0.7Sr0.3MnO3/SrTiO3 Heterostructures: A Case of Enhanced Interlayer Coupling Controlled by the Interface

被引：83

作者：

Bruno, F. Y. ^{[1
]}

Garcia-Barriocanal, J. ^{[1
,2
]}

Varela, M. ^{[3
]}

Nemes, N. M. ^{[1
]}

Thakur, P.

Cezar, J. C.

Brookes, N. B.

Rivera-Calzada, A. ^{[1
]}

Garcia-Hernandez, M. ^{[4
]}

Leon, C. ^{[1
]}

Okamoto, S. ^{[3
]}

Pennycook, S. J. ^{[3
]}

Santamaria, J. ^{[1
]}

机构：

[1] Univ Complutense Madrid, GFMC, Dept Fis Aplicada 3, E-28040 Madrid, Spain

[2] European Synchrotron Radiat Facil, SpLine Spanish CRG Beamline, F-38043 Grenoble, France

[3] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[4] Consejo Super Invest Cient, Inst Ciencia Mat Madrid, Canto Blanco 28049, Spain

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 14期

关键词：

OXIDES;

D O I：

10.1103/PhysRevLett.106.147205

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the magnetic coupling of La0.7Sr0.3MnO3 layers through SrTiO3 spacers in La0.7Sr0.3MnO3/SrTiO3 epitaxial heterostructures. Combined aberration-corrected microscopy and electron-energy-loss spectroscopy evidence charge transfer to the empty conduction band of the titanate. Ti d electrons interact via superexchange with Mn, giving rise to a Ti magnetic moment as demonstrated by x-ray magnetic circular dichroism. This induced magnetic moment in the SrTiO3 controls the bulk magnetic and transport properties of the superlattices when the titanate layer thickness is below 1 nm.

引用

页数：4

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