Photoemission study of weakly magnetic (formula presented)

J. Y. Son, T. Konishi, T. Mizokawa, A. Fujimori

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Abstract

We have studied the electronic structure of (Formula presented) with (Formula presented), 0.12, and 0.18, which compositions cover the paramagnetic, metamagnetic, and ferromagnetic phases, by means of photoemission and inverse-photoemission spectroscopy. With Al substitution, broad peaks near the Fermi level (Formula presented) are shifted upwards and one of them crosses (Formula presented) as predicted by band-structure calculation, although the peaks are much broader than predicted by the calculation. The overall Co (Formula presented) band is narrow and has a high binding energy tail compared to the band-structure calculation, indicating significant electron correlation effects in the Co (Formula presented) band. In order to explain these observations, model self-energy corrections have been applied to the band density of states. The lower energy scale of the self-energy is found to lie in the same range as the characteristic temperature of the magnetic susceptibility.

Original languageEnglish
Pages (from-to)538-542
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number1
DOIs
Publication statusPublished - 1999 Jan 1

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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