Phase transitions and the role of vanadium t2g states in A V13 O18 (A=Sr,Ba )

M. Ikeda, Y. Nagamine, S. Mori, J. E. Kim, K. Kato, M. Takata, Takuro Katsufuji

    Research output: Contribution to journalArticle

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    Abstract

    We studied A V13 O18 (A=Sr,Ba), in which V ions form a face-centered-cubic lattice with periodically missing ions. It was found that there is a phase transition in both SrV13 O18 (Tc =270 K) and BaV13 O18 (Tc =200 K), where anomalies are observed in resistivity and magnetic susceptibility. Resistivity shows a contrasting behavior in the low-temperature phase between SrV13 O18 (a metallic behavior) and BaV13 O18 (an insulating behavior). By synchrotron x-ray powder-diffraction measurement, it was found that V trimerization occurs at the phase transition of SrV13 O 18. On the other hand, BaV13 O18 does not show a large change in the x-ray powder diffraction but superlattice peaks at (0 1 2 1 2) was observed in the electron diffraction. Possible orbital states of the t2g electrons in the V ions are discussed.

    Original languageEnglish
    Article number104415
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume82
    Issue number10
    DOIs
    Publication statusPublished - 2010 Sep 10

    Fingerprint

    Vanadium
    vanadium
    Phase transitions
    Ions
    magnetic permeability
    X rays
    face centered cubic lattices
    ions
    electrical resistivity
    Synchrotrons
    Magnetic susceptibility
    diffraction
    Electron diffraction
    synchrotrons
    x rays
    electron diffraction
    anomalies
    orbitals
    Electrons
    electrons

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Phase transitions and the role of vanadium t2g states in A V13 O18 (A=Sr,Ba ). / Ikeda, M.; Nagamine, Y.; Mori, S.; Kim, J. E.; Kato, K.; Takata, M.; Katsufuji, Takuro.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 82, No. 10, 104415, 10.09.2010.

    Research output: Contribution to journalArticle

    Ikeda, M. ; Nagamine, Y. ; Mori, S. ; Kim, J. E. ; Kato, K. ; Takata, M. ; Katsufuji, Takuro. / Phase transitions and the role of vanadium t2g states in A V13 O18 (A=Sr,Ba ). In: Physical Review B - Condensed Matter and Materials Physics. 2010 ; Vol. 82, No. 10.
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    abstract = "We studied A V13 O18 (A=Sr,Ba), in which V ions form a face-centered-cubic lattice with periodically missing ions. It was found that there is a phase transition in both SrV13 O18 (Tc =270 K) and BaV13 O18 (Tc =200 K), where anomalies are observed in resistivity and magnetic susceptibility. Resistivity shows a contrasting behavior in the low-temperature phase between SrV13 O18 (a metallic behavior) and BaV13 O18 (an insulating behavior). By synchrotron x-ray powder-diffraction measurement, it was found that V trimerization occurs at the phase transition of SrV13 O 18. On the other hand, BaV13 O18 does not show a large change in the x-ray powder diffraction but superlattice peaks at (0 1 2 1 2) was observed in the electron diffraction. Possible orbital states of the t2g electrons in the V ions are discussed.",
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    AU - Ikeda, M.

    AU - Nagamine, Y.

    AU - Mori, S.

    AU - Kim, J. E.

    AU - Kato, K.

    AU - Takata, M.

    AU - Katsufuji, Takuro

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    N2 - We studied A V13 O18 (A=Sr,Ba), in which V ions form a face-centered-cubic lattice with periodically missing ions. It was found that there is a phase transition in both SrV13 O18 (Tc =270 K) and BaV13 O18 (Tc =200 K), where anomalies are observed in resistivity and magnetic susceptibility. Resistivity shows a contrasting behavior in the low-temperature phase between SrV13 O18 (a metallic behavior) and BaV13 O18 (an insulating behavior). By synchrotron x-ray powder-diffraction measurement, it was found that V trimerization occurs at the phase transition of SrV13 O 18. On the other hand, BaV13 O18 does not show a large change in the x-ray powder diffraction but superlattice peaks at (0 1 2 1 2) was observed in the electron diffraction. Possible orbital states of the t2g electrons in the V ions are discussed.

    AB - We studied A V13 O18 (A=Sr,Ba), in which V ions form a face-centered-cubic lattice with periodically missing ions. It was found that there is a phase transition in both SrV13 O18 (Tc =270 K) and BaV13 O18 (Tc =200 K), where anomalies are observed in resistivity and magnetic susceptibility. Resistivity shows a contrasting behavior in the low-temperature phase between SrV13 O18 (a metallic behavior) and BaV13 O18 (an insulating behavior). By synchrotron x-ray powder-diffraction measurement, it was found that V trimerization occurs at the phase transition of SrV13 O 18. On the other hand, BaV13 O18 does not show a large change in the x-ray powder diffraction but superlattice peaks at (0 1 2 1 2) was observed in the electron diffraction. Possible orbital states of the t2g electrons in the V ions are discussed.

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