X-ray photoelectron spectra of perovskite-type cobalt oxides La1-xSrxCoO3-y (x = 0.4, 0.6)
Author(s)
BOCQUET, AE
CHALKER, P
DOBSON, JF
HEALY, PC
MYHRA, S
THOMPSON, JG
Year published
1989
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Show full item recordAbstract
X-ray photoelectron spectra have been collected for bulk samples of the ternary perovskite-type cobalt oxides La1-xSrxCoO3-y (x=0.4, 0.6). Anomalously low binding energy components for the O 1s and Sr 3d photopeaks, similar to those recorded for the family of high temperature superconducting copper oxides, have been observed. These observations have been interpreted in terms of an initial-state screening mechanism and the implications for the electronic structure of "metallic" oxides are discussed. The Co 2p signature is typical of low spin Co3+, suggesting that doping by strontium leads to the formation of holes in the ...
View more >X-ray photoelectron spectra have been collected for bulk samples of the ternary perovskite-type cobalt oxides La1-xSrxCoO3-y (x=0.4, 0.6). Anomalously low binding energy components for the O 1s and Sr 3d photopeaks, similar to those recorded for the family of high temperature superconducting copper oxides, have been observed. These observations have been interpreted in terms of an initial-state screening mechanism and the implications for the electronic structure of "metallic" oxides are discussed. The Co 2p signature is typical of low spin Co3+, suggesting that doping by strontium leads to the formation of holes in the oxygen bands.
View less >
View more >X-ray photoelectron spectra have been collected for bulk samples of the ternary perovskite-type cobalt oxides La1-xSrxCoO3-y (x=0.4, 0.6). Anomalously low binding energy components for the O 1s and Sr 3d photopeaks, similar to those recorded for the family of high temperature superconducting copper oxides, have been observed. These observations have been interpreted in terms of an initial-state screening mechanism and the implications for the electronic structure of "metallic" oxides are discussed. The Co 2p signature is typical of low spin Co3+, suggesting that doping by strontium leads to the formation of holes in the oxygen bands.
View less >
Journal Title
Physica C: Superconductivity and its Applications
Volume
160
Publisher URI
Copyright Statement
© 1989 Elsevier. Please refer to the journal's website for access to the definitive, published version.
Subject
Condensed matter physics
Materials engineering