Electronic states and possible origin of the orbital-glass state in a nearly metallic spinel cobalt vanadate: An x-ray magnetic circular dichroism study

Yosuke Nonaka, Goro Shibata, Rui Koborinai, Keisuke Ishigami, Shoya Sakamoto, Keisuke Ikeda, Zhendong Chi, Tsuneharu Koide, Arata Tanaka, Takuro Katsufuji, Atsushi Fujimori

    Research output: Contribution to journalArticle

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    Abstract

    We have investigated the orbital states of the orbital-glassy (short-range orbital ordered) spinel vanadate Co1.21V1.79O4 using x-ray absorption spectroscopy (XAS), x-ray magnetic circular dichroism (XMCD), and subsequent configuration-interaction cluster-model calculation. From the sign of the XMCD spectra, it was found that the spin magnetic moment of the Co ion is aligned parallel to the applied magnetic field and that of the V ion antiparallel to it, consistent with neutron scattering studies. It was revealed that the excess Co ions at the octahedral site take the trivalent low-spin state and induce a random potential to the V sublattice. The orbital magnetic moment of the V ion is small, suggesting that the ordered orbitals mainly consist of real-number orbitals.

    Original languageEnglish
    Article number205126
    JournalPhysical Review B
    Volume97
    Issue number20
    DOIs
    Publication statusPublished - 2018 May 22

    Fingerprint

    Vanadates
    vanadates
    Dichroism
    Electronic states
    Cobalt
    dichroism
    spinel
    cobalt
    Ions
    X rays
    orbitals
    Glass
    glass
    Magnetic moments
    electronics
    x rays
    ions
    Neutron scattering
    magnetic moments
    Absorption spectroscopy

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

    Cite this

    Electronic states and possible origin of the orbital-glass state in a nearly metallic spinel cobalt vanadate : An x-ray magnetic circular dichroism study. / Nonaka, Yosuke; Shibata, Goro; Koborinai, Rui; Ishigami, Keisuke; Sakamoto, Shoya; Ikeda, Keisuke; Chi, Zhendong; Koide, Tsuneharu; Tanaka, Arata; Katsufuji, Takuro; Fujimori, Atsushi.

    In: Physical Review B, Vol. 97, No. 20, 205126, 22.05.2018.

    Research output: Contribution to journalArticle

    Nonaka, Y, Shibata, G, Koborinai, R, Ishigami, K, Sakamoto, S, Ikeda, K, Chi, Z, Koide, T, Tanaka, A, Katsufuji, T & Fujimori, A 2018, 'Electronic states and possible origin of the orbital-glass state in a nearly metallic spinel cobalt vanadate: An x-ray magnetic circular dichroism study', Physical Review B, vol. 97, no. 20, 205126. https://doi.org/10.1103/PhysRevB.97.205126
    Nonaka, Yosuke ; Shibata, Goro ; Koborinai, Rui ; Ishigami, Keisuke ; Sakamoto, Shoya ; Ikeda, Keisuke ; Chi, Zhendong ; Koide, Tsuneharu ; Tanaka, Arata ; Katsufuji, Takuro ; Fujimori, Atsushi. / Electronic states and possible origin of the orbital-glass state in a nearly metallic spinel cobalt vanadate : An x-ray magnetic circular dichroism study. In: Physical Review B. 2018 ; Vol. 97, No. 20.
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    AU - Nonaka, Yosuke

    AU - Shibata, Goro

    AU - Koborinai, Rui

    AU - Ishigami, Keisuke

    AU - Sakamoto, Shoya

    AU - Ikeda, Keisuke

    AU - Chi, Zhendong

    AU - Koide, Tsuneharu

    AU - Tanaka, Arata

    AU - Katsufuji, Takuro

    AU - Fujimori, Atsushi

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