Theory of Impurity Effects on the Spin Nematic State

Theory of Impurity Effects on the Spin Nematic State

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 nonmag...

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Veröffentlicht in:arXiv.org 2011-06
Hauptverfasser: Takano, Junji, Tsunetsugu, Hirokazu
Format: Artikel
Sprache:eng
Schlagworte:
Anisotropy
Ferromagnetism
Freezing
Impurities
Impurity effects
Magnetic moments
Magnetism
Physics - Strongly Correlated Electrons
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Zusammenfassung: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1104.5354