X-ray emission and photoelectron spectra of Pr{sub 0.5}Sr{sub 0.5}MnO{sub 3}

Journal Article · Sat May 01 04:00:00 EDT 1999 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.59.12799· OSTI ID:341382

Kurmaev, E Z; Korotin, M A; Galakhov, V R; Finkelstein, L D; Zabolotzky, E I; Efremova, N N ^[1]; Lobachevskaya, N I ^[2]; Stadler, S; Ederer, D L ^[3]; Callcott, T A; Zhou, L ^[4]; Moewes, A ^[5]; Bartkowski, S; Neumann, M ^[6]; Matsuno, J; Mizokawa, T; Fujimori, A ^[7]; Mitchell, J ^[8]

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1. Institute of Metal Physics, Russian Academy of Sciences--Ural Division, 620219 Yekaterinburg GSP-170 (Russia)
2. Institute of Solid State Chemistry, Russian Academy of Sciences--Ural Division, 620219 Yekaterinburg GSP-145 (Russia)
3. Department of Physics, Tulane University, New Orleans, Louisiana 70118 (United States)
4. Department of Physics, University of Tennessee, Knoxville, Tennessee 37996 (United States)
5. Center for Advanced Microstructures and Devices at Louisiana State University, Baton Rouge, Louisiana 70806 (United States)
6. Universitaet Osnabrueck, Fachbereich Physik, D-49069 Osnabrueck (Germany)
7. Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113 (Japan)
8. Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)

The results of measurements of x-ray photoelectron (XPS), x-ray emission (XES), and x-ray absorption spectra and local spin-density approximation band structure (LSDA) calculations of Pr{sub 0.5}Sr{sub 0.5}MnO{sub 3} are presented. The excitation energy dependence of Mn L{sub 2,3} and O K{alpha} x-ray emission spectra of Pr{sub 0.5}Sr{sub 0.5}MnO{sub 3} is measured using tunable synchrotron radiation. The XES measurements yielded no photon energy dependence for the O K{alpha} spectra, but the Mn L{sub 2,3} spectra yielded inelastic scattering losses of 2 and 6 eV, corresponding to features in the structure of the occupied part of the valence band. Comparing XPS and XES measurements with LSDA band-structure calculations, one concludes that the electronic structure of the compound consists mainly of Mn 3d and O 2p states. States of 3d character localized at the Mn site predominate near the top of the valence band (VB). Some differences in the Mn 3d distribution in this part of the XPS valence band and Mn L{sub 3} XES with {ital d} symmetry due to spin-selection rules that govern the Mn L{sub 3} XES. In addition, the Mn 3d states distribution is hybridized with the O 2p part of the VB. Mn L{sub 3} XES spectra were determined relative to the Fermi energy by assuming normal x-ray emission begins from the lowest level of the p{sup 5}d{sup n+1}L intermediate state (which is the Mn 2p ionizatation threshold). From the local spin-density approximation, the orbital character of the Mn 3d electrons can be assigned e{sub g} symmetry at the top of the valence band T{sub 2g} in the central part of the VB, and equal contributions of e{sub g} and t{sub 2g} states at the bottom of the valence band. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 341382
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 20 Vol. 59; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ELECTRONIC STRUCTURE
FERMI LEVEL
FERROMAGNETIC MATERIALS
MAGNETORESISTANCE
MANGANESE OXIDES
PEROVSKITES
PHOTOELECTRON SPECTROSCOPY
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
X-RAY SPECTROSCOPY