Orbital fluctuations in spinel Mn(V 1-xAl x) 2O 4 studied by thermal conductivity measurements

T. Omura, T. Ishikawa, Y. Ishitsuka, T. Katsufuji*

*この研究の対応する著者

研究成果: Article査読

19 被引用数 (Scopus)

抄録

We measured the thermal conductivity of spinel MnV 2O 4 and Al-doped samples with an applied magnetic field, and they exhibited orbital and spin ordering at low temperatures. We found that the thermal resistivity (reciprocal thermal conductivity) in the orbital-disordered phase is enhanced when the system approaches the critical point of the orbital ordering under the variation of both temperature and magnetic field, but it is suppressed when it crosses the critical point and goes into the orbital-ordered phase. This result indicates that the thermal conductivity of these compounds is dominated by the fluctuation of V t 2g orbitals.

本文言語English
論文番号054436
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
86
5
DOI
出版ステータスPublished - 2012 8月 21

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

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