Nanoscale analysis of a SrTiO3/La2/3Sr1/3MnO3 interface
Creators
- 1. Unite mixte de Physique CNRS/THALES, Domaine de Corbeville, 91404 Orsay Cedex, France and Universite Paris-Sud, 91405 Orsay Cedex (France)
- 2. Laboratoire de Physique des Solides, UMR CNRS 8502, Batiment 510, Universite Paris Sud, 91405 Orsay (France)
- 3. Laboratoire Aime Cotton, UPR CNRS 3321, Batiment 505, Universite Paris Sud, 91405 Orsay (France)
Description
The aim of the present work is an atomic scale characterization of the SrTiO3/La2/3Sr1/3MnO3 interface involved in Co/SrTiO3/La2/3Sr1/3MnO3 tunnel junctions. Our high-resolution transmission electron microscopy experiments show the quality of the pseudo-morphic growth of La2/3Sr1/3MnO3 (LSMO) and SrTiO3 (STO), but do not allow us to determine the termination of LSMO. On the other hand, we have carried out an energy-loss near-edge structure study of the Mn2p and O1s edges. The main result is that the valence of Mn keeps its intrinsic value of the bulk material till the last MnO2 layers at the interface, which is consistent with the observation of magnetoresistance up to practically the Curie temperature of bulk LSMO in our junctions. These results suggest a La2/3Sr1/3O termination of LSMO
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter and Materials Physics
- Journal Volume
- 66
- Journal Issue
- 1
- Journal Page Range
- p. 014417-014417.9
- ISSN
- 1098-0121
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 36001275
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- CRYSTAL GROWTH; CURIE POINT; ENERGY-LOSS SPECTROSCOPY; FERROMAGNETIC MATERIALS; INTERFACES; LANTHANUM COMPOUNDS; LAYERS; MAGNETISM; MAGNETORESISTANCE; MANGANATES; MANGANESE OXIDES; NANOSTRUCTURES; STRONTIUM COMPOUNDS; STRONTIUM TITANATES; TRANSMISSION ELECTRON MICROSCOPY; TUNNEL EFFECT; VALENCE
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELECTRON MICROSCOPY; ELECTRON SPECTROSCOPY; MAGNETIC MATERIALS; MANGANESE COMPOUNDS; MATERIALS; MICROSCOPY; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SPECTROSCOPY; STRONTIUM COMPOUNDS; THERMODYNAMIC PROPERTIES; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE
Optional Information
- Notes
- (c) 2002 The American Physical Society