Structural and magnetic properties in the quantum S=12 dimer system Ba 3(Cr1-xVx)2O8 with site disorder

Tao Hong, L. Y. Zhu, X. Ke, V. O. Garlea, Y. Qiu, Y. Nambu, H. Yoshizawa, M. Zhu, G. E. Granroth, A. T. Savici, Zheng Gai, H. D. Zhou

研究成果: Article査読

3 被引用数 (Scopus)

抄録

We report a comprehensive study of dc susceptibility, specific-heat, neutron-diffraction, and inelastic neutron-scattering measurements on polycrystalline Ba3(Cr1-xVx)2O 8 samples, where x=0, 0.06, 0.15, and 0.53. A Jahn-Teller structure transition occurs for x=0, 0.06, and 0.15 samples, and the transition temperature is reduced upon vanadium substitution from 70(2) K at x=0 to 60(2) K at x=0.06 and 0.15. The structure becomes less distorted as x increases, and such transition disappears at x=0.53. The observed magnetic excitation spectrum indicates that the singlet ground state remains unaltered and spin-gap energy Δ=1.3(1) meV is identical within the instrument resolution for all x. In addition, the dispersion bandwidth W decreases with increase of x. At x=0.53, W is reduced to 1.4(1) meV from 2.0(1) meV at x=0.

本文言語English
論文番号144427
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
87
14
DOI
出版ステータスPublished - 2013 4 30

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

「Structural and magnetic properties in the quantum S=12 dimer system Ba <sub>3</sub>(Cr<sub>1-x</sub>V<sub>x</sub>)<sub>2</sub>O<sub>8</sub> with site disorder」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。

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