%0 Journal Article
%K Spectroscopy
%K Manganese oxide
%K Magnetic fields
%K Manganese
%K Epitaxial growth
%K Strontium titanates
%K Strontium
%K Dichroism
%K X-ray magnetic circular dichroism
%K Strontium titanate
%K Applied magnetic fields
%K Magnetic state
%K LSMO films
%K Magnetic configuration
%K Scattering measurements
%K Surface normal directions
%K Magnetic thick films
%A J.-S Lee
%A D.A Arena
%A P Yu
%A C.S Nelson
%A R Fan
%A C.J Kinane
%A S Langridge
%A M.D Rossell
%A Ramamoorthy Ramesh
%A C.-C Kao
%B Physical Review Letters
%D 2010
%G eng
%R 10.1103/PhysRevLett.105.257204
%T Hidden magnetic configuration in epitaxial La1-xSr xMnO3 films
%V 105
%X We present an unreported magnetic configuration in epitaxial La 1-xSrxMnO3 (x∼0.3) (LSMO) films grown on strontium titanate (STO). X-ray magnetic circular dichroism indicates that the remanent magnetic state of thick LSMO films is opposite to the direction of the applied magnetic field. Spectroscopic and scattering measurements reveal that the average Mn valence varies from mixed Mn3⊃+/Mn4⊃+ to an enriched Mn3⊃+ region near the STO interface, resulting in a compressive lattice along the a, b axis and a possible electronic reconstruction in the Mn e g orbital (d3z2-r2). This reconstruction may provide a mechanism for coupling the Mn3⊃+ moments antiferromagnetically along the surface normal direction, and in turn may lead to the observed reversed magnetic configuration. © 2010 The American Physical Society.