Elastic Anomalies in Orbital-Degenerate Frustrated Spinel CoV2O4

Tadataka Watanabe, Shogo Yamada, Rui Koborinai, Takuro Katsufuji

Research output: Contribution to journalConference articlepeer-review

Abstract

Ultrasound velocity measurements were performed on a single crystal of the orbital-degenerate frustrated spinel CoV2O4 in all the symmetrically-independent elastic moduli of the cubic crystal. The measurements of temperature dependence of the elastic moduli observed discontinuous elastic anomalies due to a ferrimagnetic transition at TC = 165 K and another phase transition at T = 50 K. Additionally, the measurements observed anomalous temperature dependence of the elastic moduli, specifically, non-monotonic temperature dependence in the magnetically-ordered phase below TC, and magnetic-field-sensitive elastic softening with decreasing temperature in the paramagnetic phase above TC. These anomalous temperature variations below and above TC should be driven by the coupling of lattice to magnetic excitations.

Original languageEnglish
Pages (from-to)898-901
Number of pages4
JournalPhysics Procedia
Volume75
DOIs
Publication statusPublished - 2015
Event20th International Conference on Magnetism, ICM 2015 - Barcelona, Spain
Duration: 2015 Jul 52015 Jul 10

Keywords

  • Frustration
  • Orbital order
  • Sound velocity
  • Vanadate spinel

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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