Photoemission study of weakly magnetic Y(Co1-xAlx)2

J. Y. Son, T. Konishi, Takashi Mizokawa, A. Fujimori, K. Koui, T. Goto

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have studied the electronic structure of Y(Co1-xAlx)2 with x=0.0, 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 (EF) are shifted upwards and one of them crosses EF as predicted by band-structure calculation, although the peaks are much broader than predicted by the calculation. The overall Co 3d band is narrow and has a high binding energy tail compared to the band-structure calculation, indicating significant electron correlation effects in the Co 3d 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
Publication statusPublished - 1999
Externally publishedYes

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Photoemission
photoelectric emission
Band structure
Electron correlations
Photoelectron spectroscopy
Fermi level
Binding energy
Magnetic susceptibility
Electronic structure
Substitution reactions
energy
Chemical analysis
binding energy
substitutes
electronic structure
magnetic permeability
Temperature
spectroscopy
electrons
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Son, J. Y., Konishi, T., Mizokawa, T., Fujimori, A., Koui, K., & Goto, T. (1999). Photoemission study of weakly magnetic Y(Co1-xAlx)2. Physical Review B - Condensed Matter and Materials Physics, 60(1), 538-542.

Photoemission study of weakly magnetic Y(Co1-xAlx)2. / Son, J. Y.; Konishi, T.; Mizokawa, Takashi; Fujimori, A.; Koui, K.; Goto, T.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 60, No. 1, 1999, p. 538-542.

Research output: Contribution to journalArticle

Son, JY, Konishi, T, Mizokawa, T, Fujimori, A, Koui, K & Goto, T 1999, 'Photoemission study of weakly magnetic Y(Co1-xAlx)2', Physical Review B - Condensed Matter and Materials Physics, vol. 60, no. 1, pp. 538-542.
Son, J. Y. ; Konishi, T. ; Mizokawa, Takashi ; Fujimori, A. ; Koui, K. ; Goto, T. / Photoemission study of weakly magnetic Y(Co1-xAlx)2. In: Physical Review B - Condensed Matter and Materials Physics. 1999 ; Vol. 60, No. 1. pp. 538-542.
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