Local spin moment of LaCoO3 probed by a core hole

Chikashi Suzuki, Jun Kawai, Jun Ya Tanizawa, Hirohiko Adachi, Shuji Kawasaki, Mikio Takano, Takeshi Mukoyama

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Abstract

The electronic structures of the ground state and the 1s-1 core-hole state of high-spin cobalt oxide clusters are calculated. The calculated results indicate that the high-spin Co3+ oxide becomes low spin in the core-hole state. To check the validity of the present calculation, we have measured the high-resolution X-ray fluorescence spectra of the Co K-L3 (Kα1) line shape for various cobalt compounds using a double-crystal X-ray fluorescence spectrometer: Co(acac)2, Co(acac)3, CoF3, CoCl2, CoBr2, K3[Co(CN)6], CoO, Co3O4, LaCoO3, and Co (metal), where acac denotes CH3COCHCOCH3 -. We conclude from the comparison of the calculations with the experimental results that the cobalt ion in LaCoO3 at room temperature is high-spin state in spite that the reported spin state of this perovskite is different among the probing methods. The implications of the spin-flip shake-down process for the interpretation of the core-level X-ray photoelectron spectra, X-ray absorption spectra, and X-ray fluorescence spectra are discussed.

Original languageEnglish
Pages (from-to)17-27
Number of pages11
JournalChemical Physics
Volume241
Issue number1
DOIs
Publication statusPublished - Feb 1 1999

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Suzuki, C., Kawai, J., Tanizawa, J. Y., Adachi, H., Kawasaki, S., Takano, M., & Mukoyama, T. (1999). Local spin moment of LaCoO3 probed by a core hole. Chemical Physics, 241(1), 17-27. https://doi.org/10.1016/S0301-0104(98)00402-9