Theory of Impurity Effects on the Spin Nematic State
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概要
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The effect of magnetic bond disorder in otherwise antiferro nematic ordered system is investigated. We introduced triangular-shaped ferromagnetic bond disorder in the S=1 bilinear--biquadratic model on a triangular lattice. It is shown that the coupling between the impurity magnetic moment and nonmagnetic excitation in the bulk yields single-moment anisotropy and long-range anisotropic interaction between impurity magnetic moments. This interaction can induce unconventional spin-freezing phenomena observed in triangular magnet, NiGa2S4.
- 2011-09-15
著者
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Tsunetsugu Hirokazu
Institute For Solid Physics The University Of Tokyo
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Tsunetsugu Hirokazu
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Takano Junji
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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