Electron Spectroscopic Data of La1−xSrxMnO3and La1−xSrxCoO3
作者:
D. D. Sarma,
Dinesh Topwal,
A. Chainani,
期刊:
Surface Science Spectra
(AIP Available online 1999)
卷期:
Volume 6,
issue 4
页码: 274-291
ISSN:1055-5269
年代: 1999
DOI:10.1116/1.1247934
出版商: American Vacuum Society
关键词: magnetic materials;metal-insulator transition;magnetoresistive systems;perovskites;doped transition metal oxides
数据来源: AIP
摘要:
We report various high-energy electron spectroscopic data on sintered polycrystalline La1−xSrxMnO3and La1−xSrxCoO3withx=0.0, 0.1, 0.2, 0.3, and 0.4. The data presented consist of x-ray photoelectron transition metal 2pcore level and valence band spectra, x-ray initiated transition metalL3VVspectra, Bremsstrahlung isochromat spectra, and soft x-ray absorption spectra at the oxygenK-edge. Substitution of trivalent La with divalent Sr introduces holes into the system, driving an insulator-to-metal transition along with magnetic transitions. The spectral changes with progressive hole doping reflect the evolution of electronic structure across the phase transition.
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