Electronic Structure of Doped La-Mn-O Perovskites

• Authors: M. Demeter , M. Neumann , V.R. Galakhov , N.A. Ovechkina , E.Z. Kurmaev , N.I. Labachevskaya
• Languages of publication: EN

Abstracts

EN

The electronic structure of the doped perovskite manganese oxides La_{1-x}Sr_{x}MnO_{3} and La_{1-x}Ba_{x}MnO_{3} has been investigated by X-ray photoelectron and X-ray emission spectroscopy. By comparing the O K_{α} and Mn L_{α} X-ray emission spectra with the valence band X-ray photoelectron spectra we could localize the Mn 3d and O 2p states into the valence band. Our data are compared with previous band structure calculations. The value of the Mn 3s splitting does not change with Sr-doping in the concentration region from x=0.0 till x=0.3. This shows that the doping holes have mainly oxygen p character. The large value of the splitting indicates that the 3d electrons are in the high-spin state.

Keywords

EN

79.70.+q; 71.70.Gm

• Journal: Acta Physica Polonica A
• Year: 2000
• Volume: 98
• Issue: 5
• Pages: 587-591

Dates

published

2000-11

Contributors

author

M. Demeter

• University of Osnabrück, Faculty of Physics Barbarastr. 7, 49069 Osnabrück, Germany

author

M. Neumann

• University of Osnabrück, Faculty of Physics Barbarastr. 7, 49069 Osnabrück, Germany

author

V.R. Galakhov

• Institute of Metal Physics, Russian Academy of Sciences - Ural Division 620219 Yekaterinburg GSP-170, Russia

author

N.A. Ovechkina

• Institute of Metal Physics, Russian Academy of Sciences - Ural Division 620219 Yekaterinburg GSP-170, Russia

author

E.Z. Kurmaev

• Institute of Metal Physics, Russian Academy of Sciences - Ural Division 620219 Yekaterinburg GSP-170, Russia

author

N.I. Labachevskaya

• Institute of Chemistry of Solids, Russian Academy of Sciences - Ural Division 620219 Yekaterinburg GSP-145, Russia