Observation of energy gap in FeGa3

Naohito Tsujii, Hitoshi Yamaoka, Masaharu Matsunami, Ritsuko Eguchi, Yukiaki Ishida, Yasunori Senba, Haruhiko Ohashi, Shik Shin, Takao Furubayashi, Hideki Abe, Hideaki Kitazawa

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30 Citations (Scopus)

Abstract

The existence of an energy gap around the Fermi energy is established experimentally for the intermetallic compound FeGa3. 57Fe Mössbauer spectra measured at room temperature confirmed the absence of magnetic ordering. The temperature dependence of magnetic susceptibility, χ(T), measured on single-crystalline samples showed diamagnetic behavior below room temperature, and it increased exponentially with temperature above 500 K. Fitting to the high-temperature data yielded an energy gap Δ of 0.29-0.45 eV. Valence-band x-ray photoemission spectra directly revealed the energy gap, the size of which was estimated to be Δ ≲ 0.8 eV. These results agree with the prediction by recent band calculations.

Original languageEnglish
Article number024705
Journaljournal of the physical society of japan
Volume77
Issue number2
DOIs
Publication statusPublished - Feb 1 2008
Externally publishedYes

Keywords

  • Energy gap
  • FeGa
  • Intermetallic compounds
  • Magnetic susceptibility
  • Mössbauer spectra
  • Photoemission

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Tsujii, N., Yamaoka, H., Matsunami, M., Eguchi, R., Ishida, Y., Senba, Y., Ohashi, H., Shin, S., Furubayashi, T., Abe, H., & Kitazawa, H. (2008). Observation of energy gap in FeGa3. journal of the physical society of japan, 77(2), [024705]. https://doi.org/10.1143/JPSJ.77.024705