Monte Carlo study of half-magnetization plateau and magnetic phase diagram in pyrochlore antiferromagnetic Heisenberg model

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The antiferromagnetic Heisenberg model on a pyrochlore lattice under external magnetic field is studied by classical Monte Carlo simulation. The model includes bilinear and biquadratic interactions; the latter effectively describes the coupling to lattice distortions. The magnetization process shows a half-magnetization plateau at low temperatures, accompanied with strong suppression of the magnetic susceptibility. Temperature dependence of the plateau behavior is clarified. Finite-temperature phase diagram under the magnetic field is determined. The results are compared with recent experimental results in chromium spinel oxides.
6 pages, 4 figures, proceedings submitted to MISM2005

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/97186

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0506500
 http://arxiv.org/abs/cond-mat/0506500
 J. Mag. Mag. Mater. 300, 57 (2006)
 doi:10.1016/j.jmmm.2005.10.032

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arXiv