title: Electronic and magnetic reconstructions in La0.7Sr0.3MnO3/SrTiO3 heterostructures: a case of enhanced interlayer coupling controlled by the interface.
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.
authors.affiliation: GFMC, Departamento Física Aplicada III, Universidad Complutense de Madrid, Campus Moncloa, 28040 Madrid, Spain.
authors.forename: F Y
authors.initials: FY
authors.lastname: Bruno
authors.forename: J
authors.initials: J
authors.lastname: Garcia-Barriocanal
authors.forename: M
authors.initials: M
authors.lastname: Varela
authors.forename: N M
authors.initials: NM
authors.lastname: Nemes
authors.forename: P
authors.initials: P
authors.lastname: Thakur
authors.forename: J C
authors.initials: JC
authors.lastname: Cezar
authors.forename: N B
authors.initials: NB
authors.lastname: Brookes
authors.forename: A
authors.initials: A
authors.lastname: Rivera-Calzada
authors.forename: M
authors.initials: M
authors.lastname: Garcia-Hernandez
authors.forename: C
authors.initials: C
authors.lastname: Leon
authors.forename: S
authors.initials: S
authors.lastname: Okamoto
authors.forename: S J
authors.initials: SJ
authors.lastname: Pennycook
authors.forename: J
authors.initials: J
authors.lastname: Santamaria