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

Journal Article · Sat Jan 01 04:00:00 EST 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.106.147205· OSTI ID:1018600

Bruno, Flavio Y. ^[1]; Garcia-Barriocanal, Javier ^[1]; Varela del Arco, Maria ^[2]; Nemes, Norbert ^[1]; Thakur, P. ^[3]; Cezar, J. C. ^[3]; Rivera-Calzada, Alberto ^[1]; Garcia-Hernandez, M ^[4]; Leon, C. ^[1]; Okamoto, Satoshi ^[2]; Pennycook, Stephen J ^[2]; Santamaria, J. ^[1]

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1. Universidad Complutense, Spain
2. ORNL
3. European Synchrotron Radiation Facility (ESRF)
4. Instituto de Ciencia de Materiales de Madrid (ICMM)

We examined the electronic reconstruction that occurs at the LSMO/STO interface on epitaxial superlattices by combined magnetotransport measurements, aberration corrected microscopy and x-ray magnetic circular dichroism. We have found a reduced Ti oxidation state resulting from charge transfer at the interface. XMCD evidences magnetic moment at the Ti originated at the superexchange interaction with Mn. This induced magnetic moment at STO controls the bulk magnetic and transport properties of the superlattices when the titanate layer thickness is below 1 nm.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1018600
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 106; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MAGNETIC CIRCULAR DICHROISM
MAGNETIC MOMENTS
MICROSCOPY
SUPERLATTICES
THICKNESS
TITANATES
TRANSPORT
VALENCE