Electronic and magnetic reconstructions in La0.7Sr0.3MnO3/SrTiO3 heterostructures: a case of enhanced interlayer coupling controlled by the interface.

Bruno, F Y; Garcia-Barriocanal, J; Varela, M; Nemes, N M; Thakur, P; Cezar, J C; Brookes, N B; Rivera-Calzada, A; Garcia-Hernandez, M; Leon, C; Okamoto, S; Pennycook, S J; Santamaria, J

Bruno, F Y; Garcia-Barriocanal, J; Varela, M; Nemes, N M; Thakur, P; Cezar, J C; Brookes, N B; Rivera-Calzada, A; Garcia-Hernandez, M; Leon, C; Okamoto, S; Pennycook, S J; Santamaria, J.

Bruno FY; GFMC, Departamento Física Aplicada III, Universidad Complutense de Madrid, Campus Moncloa, 28040 Madrid, Spain.

Phys Rev Lett ; 106(14): 147205, 2011 Apr 08.

Article en En | MEDLINE | ID: mdl-21561220

ABSTRACT

ABSTRACT

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.

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Banco de datos: MEDLINE Idioma: En Año: 2011 Tipo del documento: Article

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Banco de datos: MEDLINE Idioma: En Año: 2011 Tipo del documento: Article