Infrared phonon anomalies and orbital ordering in single-crystalline MnV 2O 4 spinel

K. Myung-Whun, S. Y. Jang, Takuro Katsufuji, A. V. Boris

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    We used infrared ellipsometry to study phonons in a spinel MnV 2O 4 single crystal. At 300 K, the imaginary part of the complex dielectric function spectra show four phonon peaks. Below the cubic-tetragonal structural transition temperature at 58 K, small peaks appear around the cubic modes and the number of phonons becomes more than 12. The group analysis predicted 12 infrared modes for the I4 1/a symmetry. The observed modes support the I4 1/a or lower crystal symmetry, which reflects the antiferro ordering of V3 + t 2g orbitals.

    Original languageEnglish
    Article number224423
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume85
    Issue number22
    DOIs
    Publication statusPublished - 2012 Jun 20

    Fingerprint

    Phonons
    spinel
    anomalies
    Crystalline materials
    Infrared radiation
    orbitals
    Ellipsometry
    Crystal symmetry
    phonons
    Superconducting transition temperature
    Single crystals
    symmetry
    ellipsometry
    transition temperature
    single crystals
    crystals
    spinell

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Infrared phonon anomalies and orbital ordering in single-crystalline MnV 2O 4 spinel. / Myung-Whun, K.; Jang, S. Y.; Katsufuji, Takuro; Boris, A. V.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 85, No. 22, 224423, 20.06.2012.

    Research output: Contribution to journalArticle

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