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

doi:10.1143/JPSJ.77.024705

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

Research Institute for Interdisciplinary Science

Research output: Contribution to journal › Article › peer-review

32 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 language	English
Article number	024705
Journal	journal of the physical society of japan
Volume	77
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.77.024705
Publication status	Published - Feb 2008

Keywords

Energy gap
FeGa
Intermetallic compounds
Magnetic susceptibility
Mössbauer spectra
Photoemission

ASJC Scopus subject areas

Physics and Astronomy(all)

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Observation of energy gap in FeGa₃. / Tsujii, Naohito; Yamaoka, Hitoshi; Matsunami, Masaharu; Eguchi, Ritsuko; Ishida, Yukiaki; Senba, Yasunori; Ohashi, Haruhiko; Shin, Shik; Furubayashi, Takao; Abe, Hideki; Kitazawa, Hideaki.

In: journal of the physical society of japan, Vol. 77, No. 2, 024705, 02.2008.

Research output: Contribution to journal › Article › peer-review

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abstract = "The existence of an energy gap around the Fermi energy is established experimentally for the intermetallic compound FeGa3. 57Fe M{\"o}ssbauer 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.",

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AU - Tsujii, Naohito

AU - Yamaoka, Hitoshi

AU - Matsunami, Masaharu

AU - Eguchi, Ritsuko

AU - Ishida, Yukiaki

AU - Senba, Yasunori

AU - Ohashi, Haruhiko

AU - Shin, Shik

AU - Furubayashi, Takao

AU - Abe, Hideki

AU - Kitazawa, Hideaki

PY - 2008/2

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N2 - 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.

AB - 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.

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KW - FeGa

KW - Intermetallic compounds

KW - Magnetic susceptibility

KW - Mössbauer spectra

KW - Photoemission

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