Observation of multiferroicity in GaFeO3 by Mössbauer spectroscopy

S. Nakamura, Y. Kobayashi, S. Kitao, M. Seto, A. Fuwa

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    The multiferroic nature of GaFeO3 has been examined by 57Fe Mössbauer spectroscopy in applied magnetic field. The spectra were analyzed as superposition of three subspectra corresponding to Fe3+ ions on Fe1, Fe2, and Ga2 sites. The quadrupole coupling constants e2qQ/2 are about twice of the calculated values, which may be partially due to the spin-orbit interaction. At 4.2 K, e2qQ/2 of Fe1 and Fe2 sites increase noticeably when the magnetic field is applied along the c-axis. This is suggestive of the displacement of Fe ions toward -b direction. On the other hand, the increase of e2qQ/2 is not observed when the magnetic field is applied along the b-axis. These features seem to be related to the toroidal moment. An increase of hyperfine field of Fe1 site is observed when the magnetic field is applied. This may be also related to spin-orbit interaction.

    Original languageEnglish
    Article number012122
    JournalJournal of Physics: Conference Series
    Volume592
    Issue number1
    DOIs
    Publication statusPublished - 2014

    Fingerprint

    spin-orbit interactions
    magnetic fields
    spectroscopy
    ions
    quadrupoles
    moments

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Observation of multiferroicity in GaFeO3 by Mössbauer spectroscopy. / Nakamura, S.; Kobayashi, Y.; Kitao, S.; Seto, M.; Fuwa, A.

    In: Journal of Physics: Conference Series, Vol. 592, No. 1, 012122, 2014.

    Research output: Contribution to journalArticle

    Nakamura, S. ; Kobayashi, Y. ; Kitao, S. ; Seto, M. ; Fuwa, A. / Observation of multiferroicity in GaFeO3 by Mössbauer spectroscopy. In: Journal of Physics: Conference Series. 2014 ; Vol. 592, No. 1.
    @article{82e7601159ba42d3981aa39f3dd7c4ae,
    title = "Observation of multiferroicity in GaFeO3 by M{\"o}ssbauer spectroscopy",
    abstract = "The multiferroic nature of GaFeO3 has been examined by 57Fe M{\"o}ssbauer spectroscopy in applied magnetic field. The spectra were analyzed as superposition of three subspectra corresponding to Fe3+ ions on Fe1, Fe2, and Ga2 sites. The quadrupole coupling constants e2qQ/2 are about twice of the calculated values, which may be partially due to the spin-orbit interaction. At 4.2 K, e2qQ/2 of Fe1 and Fe2 sites increase noticeably when the magnetic field is applied along the c-axis. This is suggestive of the displacement of Fe ions toward -b direction. On the other hand, the increase of e2qQ/2 is not observed when the magnetic field is applied along the b-axis. These features seem to be related to the toroidal moment. An increase of hyperfine field of Fe1 site is observed when the magnetic field is applied. This may be also related to spin-orbit interaction.",
    author = "S. Nakamura and Y. Kobayashi and S. Kitao and M. Seto and A. Fuwa",
    year = "2014",
    doi = "10.1088/1742-6596/592/1/012122",
    language = "English",
    volume = "592",
    journal = "Journal of Physics: Conference Series",
    issn = "1742-6588",
    publisher = "IOP Publishing Ltd.",
    number = "1",

    }

    TY - JOUR

    T1 - Observation of multiferroicity in GaFeO3 by Mössbauer spectroscopy

    AU - Nakamura, S.

    AU - Kobayashi, Y.

    AU - Kitao, S.

    AU - Seto, M.

    AU - Fuwa, A.

    PY - 2014

    Y1 - 2014

    N2 - The multiferroic nature of GaFeO3 has been examined by 57Fe Mössbauer spectroscopy in applied magnetic field. The spectra were analyzed as superposition of three subspectra corresponding to Fe3+ ions on Fe1, Fe2, and Ga2 sites. The quadrupole coupling constants e2qQ/2 are about twice of the calculated values, which may be partially due to the spin-orbit interaction. At 4.2 K, e2qQ/2 of Fe1 and Fe2 sites increase noticeably when the magnetic field is applied along the c-axis. This is suggestive of the displacement of Fe ions toward -b direction. On the other hand, the increase of e2qQ/2 is not observed when the magnetic field is applied along the b-axis. These features seem to be related to the toroidal moment. An increase of hyperfine field of Fe1 site is observed when the magnetic field is applied. This may be also related to spin-orbit interaction.

    AB - The multiferroic nature of GaFeO3 has been examined by 57Fe Mössbauer spectroscopy in applied magnetic field. The spectra were analyzed as superposition of three subspectra corresponding to Fe3+ ions on Fe1, Fe2, and Ga2 sites. The quadrupole coupling constants e2qQ/2 are about twice of the calculated values, which may be partially due to the spin-orbit interaction. At 4.2 K, e2qQ/2 of Fe1 and Fe2 sites increase noticeably when the magnetic field is applied along the c-axis. This is suggestive of the displacement of Fe ions toward -b direction. On the other hand, the increase of e2qQ/2 is not observed when the magnetic field is applied along the b-axis. These features seem to be related to the toroidal moment. An increase of hyperfine field of Fe1 site is observed when the magnetic field is applied. This may be also related to spin-orbit interaction.

    UR - http://www.scopus.com/inward/record.url?scp=84925339416&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84925339416&partnerID=8YFLogxK

    U2 - 10.1088/1742-6596/592/1/012122

    DO - 10.1088/1742-6596/592/1/012122

    M3 - Article

    AN - SCOPUS:84925339416

    VL - 592

    JO - Journal of Physics: Conference Series

    JF - Journal of Physics: Conference Series

    SN - 1742-6588

    IS - 1

    M1 - 012122

    ER -