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

K. Myung-Whun; S. Y. Jang; T. Katsufuji; A. V. Boris

doi:10.1103/PhysRevB.85.224423

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

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

School of Advanced Science and Engineering

Research output: Contribution to journal › Article

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 language	English
Article number	224423
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	85
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.85.224423
Publication status	Published - 2012 Jun 20

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ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

Myung-Whun, K., Jang, S. Y., Katsufuji, T., & Boris, A. V. (2012). Infrared phonon anomalies and orbital ordering in single-crystalline MnV ₂O ₄ spinel. Physical Review B - Condensed Matter and Materials Physics, 85(22), [224423]. https://doi.org/10.1103/PhysRevB.85.224423

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Access to Document

10.1103/PhysRevB.85.224423