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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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