Mössbauer spectroscopy of the magnetic-field-induced ferroelectric phase of CuFeO2

Shin Nakamura, Yasuhiro Kobayashi, Shinji Kitao, Makoto Seto, Akio Fuwa, Noriki Terada

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    57 Fe Mössbauer spectroscopy in an applied magnetic field has been conducted on single crystals of CuFeO2 and CuFe 0.965Ga0.035O2 in order to investigate magnetic-field-induced ferroelectric states. The Mössbauer spectra observed under a magnetic field change significantly, corresponding to magnetic- field-induced phase transitions. In the ferroelectric incommensurate (FEIC) phase (7 < Hex < 13 T), the spectrum can be explained by a model with spins distributed at approximately 20, 95, and 160° from the c-axis in the (110) plane. This spin configuration resembles the "complex noncollinear spin configuration (CNC) " model proposed theoretically. In the FEIC phase, the isomer shift is larger, while the quadrupole splitting and average hyperfine field are smaller than those in the collinear four sublattice (4SL, 0 < Hex < 7 T) and five sublattice (5SL, H ex > 13 T) phases. In addition, a noticeable change in the hyperfine field is observed with varying magnetic fi eld. We consider that these changes indicate the change in the electronic state of the Fe3+ ion, possibly modified by a spin-orbit interaction.

    Original languageEnglish
    Article number024719
    JournalJournal of the Physical Society of Japan
    Volume84
    Issue number2
    DOIs
    Publication statusPublished - 2015 Feb 15

    Fingerprint

    magnetic fields
    spectroscopy
    spin-orbit interactions
    single crystals
    electronics
    ions

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Mössbauer spectroscopy of the magnetic-field-induced ferroelectric phase of CuFeO2 . / Nakamura, Shin; Kobayashi, Yasuhiro; Kitao, Shinji; Seto, Makoto; Fuwa, Akio; Terada, Noriki.

    In: Journal of the Physical Society of Japan, Vol. 84, No. 2, 024719, 15.02.2015.

    Research output: Contribution to journalArticle

    Nakamura, Shin ; Kobayashi, Yasuhiro ; Kitao, Shinji ; Seto, Makoto ; Fuwa, Akio ; Terada, Noriki. / Mössbauer spectroscopy of the magnetic-field-induced ferroelectric phase of CuFeO2 In: Journal of the Physical Society of Japan. 2015 ; Vol. 84, No. 2.
    @article{40513af8784e45b4a48dfba9bccf47c2,
    title = "M{\"o}ssbauer spectroscopy of the magnetic-field-induced ferroelectric phase of CuFeO2",
    abstract = "57 Fe M{\"o}ssbauer spectroscopy in an applied magnetic field has been conducted on single crystals of CuFeO2 and CuFe 0.965Ga0.035O2 in order to investigate magnetic-field-induced ferroelectric states. The M{\"o}ssbauer spectra observed under a magnetic field change significantly, corresponding to magnetic- field-induced phase transitions. In the ferroelectric incommensurate (FEIC) phase (7 < Hex < 13 T), the spectrum can be explained by a model with spins distributed at approximately 20, 95, and 160° from the c-axis in the (110) plane. This spin configuration resembles the {"}complex noncollinear spin configuration (CNC) {"} model proposed theoretically. In the FEIC phase, the isomer shift is larger, while the quadrupole splitting and average hyperfine field are smaller than those in the collinear four sublattice (4SL, 0 < Hex < 7 T) and five sublattice (5SL, H ex > 13 T) phases. In addition, a noticeable change in the hyperfine field is observed with varying magnetic fi eld. We consider that these changes indicate the change in the electronic state of the Fe3+ ion, possibly modified by a spin-orbit interaction.",
    author = "Shin Nakamura and Yasuhiro Kobayashi and Shinji Kitao and Makoto Seto and Akio Fuwa and Noriki Terada",
    year = "2015",
    month = "2",
    day = "15",
    doi = "10.7566/JPSJ.84.024719",
    language = "English",
    volume = "84",
    journal = "Journal of the Physical Society of Japan",
    issn = "0031-9015",
    publisher = "Physical Society of Japan",
    number = "2",

    }

    TY - JOUR

    T1 - Mössbauer spectroscopy of the magnetic-field-induced ferroelectric phase of CuFeO2

    AU - Nakamura, Shin

    AU - Kobayashi, Yasuhiro

    AU - Kitao, Shinji

    AU - Seto, Makoto

    AU - Fuwa, Akio

    AU - Terada, Noriki

    PY - 2015/2/15

    Y1 - 2015/2/15

    N2 - 57 Fe Mössbauer spectroscopy in an applied magnetic field has been conducted on single crystals of CuFeO2 and CuFe 0.965Ga0.035O2 in order to investigate magnetic-field-induced ferroelectric states. The Mössbauer spectra observed under a magnetic field change significantly, corresponding to magnetic- field-induced phase transitions. In the ferroelectric incommensurate (FEIC) phase (7 < Hex < 13 T), the spectrum can be explained by a model with spins distributed at approximately 20, 95, and 160° from the c-axis in the (110) plane. This spin configuration resembles the "complex noncollinear spin configuration (CNC) " model proposed theoretically. In the FEIC phase, the isomer shift is larger, while the quadrupole splitting and average hyperfine field are smaller than those in the collinear four sublattice (4SL, 0 < Hex < 7 T) and five sublattice (5SL, H ex > 13 T) phases. In addition, a noticeable change in the hyperfine field is observed with varying magnetic fi eld. We consider that these changes indicate the change in the electronic state of the Fe3+ ion, possibly modified by a spin-orbit interaction.

    AB - 57 Fe Mössbauer spectroscopy in an applied magnetic field has been conducted on single crystals of CuFeO2 and CuFe 0.965Ga0.035O2 in order to investigate magnetic-field-induced ferroelectric states. The Mössbauer spectra observed under a magnetic field change significantly, corresponding to magnetic- field-induced phase transitions. In the ferroelectric incommensurate (FEIC) phase (7 < Hex < 13 T), the spectrum can be explained by a model with spins distributed at approximately 20, 95, and 160° from the c-axis in the (110) plane. This spin configuration resembles the "complex noncollinear spin configuration (CNC) " model proposed theoretically. In the FEIC phase, the isomer shift is larger, while the quadrupole splitting and average hyperfine field are smaller than those in the collinear four sublattice (4SL, 0 < Hex < 7 T) and five sublattice (5SL, H ex > 13 T) phases. In addition, a noticeable change in the hyperfine field is observed with varying magnetic fi eld. We consider that these changes indicate the change in the electronic state of the Fe3+ ion, possibly modified by a spin-orbit interaction.

    UR - http://www.scopus.com/inward/record.url?scp=84924939603&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84924939603&partnerID=8YFLogxK

    U2 - 10.7566/JPSJ.84.024719

    DO - 10.7566/JPSJ.84.024719

    M3 - Article

    AN - SCOPUS:84924939603

    VL - 84

    JO - Journal of the Physical Society of Japan

    JF - Journal of the Physical Society of Japan

    SN - 0031-9015

    IS - 2

    M1 - 024719

    ER -