Orbital-spin-coupled fluctuations in spinel vanadate MnV2O 4

Yoichi Nii, Nobuyuki Abe, Taka Hisa Arima

研究成果: Article査読

18 被引用数 (Scopus)

抄録

The elastic properties of a spinel vanadate MnV2O4 that has an orbital degree of freedom in the triply degenerate t2g orbital at V3+(d2) sites are investigated by ultrasonic pulse-echo measurement. Considerable softening of the shear elastic constant (C 11-C12)/2 is observed as the temperature approaches the first-order transition from the high-temperature orbital-disordered cubic phase to the low-temperature orbital-ordered tetragonal phase. The softening is attributed to fluctuations between dyz and dzx. Moreover, the elastic anomaly is found to be sensitive to the external magnetic field, revealing a coupling between spin and orbital fluctuations. The elastic anomaly is well reproduced theoretically based on Landau theory and elucidates a characteristic precursor phenomenon in MnV2O4.

本文言語English
論文番号085111
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
87
8
DOI
出版ステータスPublished - 2013 2 8

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

フィンガープリント

「Orbital-spin-coupled fluctuations in spinel vanadate MnV<sub>2</sub>O <sub>4</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル