Lattice vibration modes in CdCr2O4

ORAL

Abstract

In geometric frustration magnets, spin-lattice coupling can play an important role in lifting the magnetic frustration. In order to understand the mechanism, we have performed inelastic synchrotron x-ray measurements on a single crystal of a frustrated magnet CdCr2O4 that undergoes such a three-dimensional spin-Peierls phase transition at T{\_}N = 7.8 K. Our data taken above and below T{\_}N could be well explained by the rigid ion model, which led to a full identification of the lattice vibration modes in CdCr2O4. A phonon anomaly that might be associated with the transition, however, was not observed.

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Authors

  • J.-H. Kim

    • University of Virginia

  • Seung-Hun Lee

    • University of Virginia

  • M. Matsuda

    • JAEA, Japan

  • H. Ueda

    • ISSP, University of Tokyo

  • Y. Ueda

    • ISSP, University of Tokyo

  • Jae-Ho Chung

    • Korea University, Korea
    • Korea University

  • S. Tsutsui

    • SPring8, Japan

  • A. Baron

    • SPring8, Japan