Electronic and magnetic reconstructions in La_(0.7)Sr_(0.3)MnO_(3)/SrTiO_(3) heterostructures: a case of enhanced interlayer coupling controlled by the interface

We report on the magnetic coupling of La_(0.7)Sr_(0.3)MnO_(3) layers through SrTiO_(3) spacers in La_(0.7)Sr_(0.3)MnO_(3)/SrTiO_(3) epitaxial heterostructures. Combined aberration-corrected microscopy and electron-energy-loss spectroscopy evidence charge transfer to the empty conduction band of the...

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Bibliographic Details
Authors: Varela Del Arco, María, Nemes, Norbert Marcel, Rivera Calzada, Alberto Carlos, León Yebra, Carlos, Santamaría Sánchez-Barriga, Jacobo
Format: article
Publication Date:2011
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/44567
Online Access:https://hdl.handle.net/20.500.14352/44567
Access Level:Open access
Keyword:537
Oxides.
Electricidad
Electrónica (Física)
2202.03 Electricidad
Description
Summary:We report on the magnetic coupling of La_(0.7)Sr_(0.3)MnO_(3) layers through SrTiO_(3) spacers in La_(0.7)Sr_(0.3)MnO_(3)/SrTiO_(3) 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 SrTiO_(3) controls the bulk magnetic and transport properties of the superlattices when the titanate layer thickness is below 1 nm.

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