Electronic and magnetic properties of the (001) surface of hole-doped manganites
- 24 January 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 71 (2), 024416
- https://doi.org/10.1103/physrevb.71.024416
Abstract
The electronic and magnetic properties of ferromagnetic doped manganites are investigated by means of model tight-binding and self-interaction corrected local spin density (SIC-LSD) approximation calculations. It is found that the surface alone by breaking the cubic symmetry induces a difference in the occupation of the two orbitals at the surface. We found surface localization of one orbital and hence a change in the Mn valency from four in the bulk to three at the subsurface. Different surface or disordered interface induced localization of the orbitals are considered too with respect to the nature and the strength of the local orbital ordering and magnetic exchange coupling between the surface/interface and the bulklike region. We predict that better tunneling can be achieved in tunnel barriers that favor slightly the occupancy of the Mn at the interface.
Keywords
This publication has 26 references indexed in Scilit:
- Nearly total spin polarization in La2/3Sr1/3MnO3 from tunneling experimentsApplied Physics Letters, 2003
- Origin of high transport spin polarization inDirect evidence for minority spin statesPhysical Review B, 2001
- Inhomogeneous transport in heteroepitaxial La0.7Ca0.3MnO3/SrTiO3 multilayersApplied Physics Letters, 1999
- How to Define and Calculate the Degree of Spin Polarization in FerromagnetsPhysical Review Letters, 1999
- Fermi surface of the colossal magnetoresistance perovskite La0.7Sr0.3MnO3Journal of Physics: Condensed Matter, 1999
- Spin-flip scattering in magnetic junctionsPhysical Review B, 1998
- Tunneling magnetoresistance in mixed-valence manganite tunnel junctionsPhysical Review B, 1998
- Lattice effects in ferromagnetic manganite perovskitesJournal of Applied Physics, 1998
- Pseudogaps, Jahn-Teller distortions, and magnetic order in manganite perovskitesPhysical Review B, 1998
- Transport and fermiology of the ferromagnetic phase of (A = Ca, Sr, Ba)Journal of Magnetism and Magnetic Materials, 1997