Spin-lattice model of Magneto-electric Transitions in RbCoBr$_3$

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Extensive Monte Carlo simulations are performed to analyze a recent neutron diffraction experiment on a distorted triangular lattice compound RbCoBr$_3$. We consider a spin-lattice model, where both spin and lattice are Ising variables. This model explains well successive magnetic and dielectric transitions observed in the experiment. The exchange interaction parameters and the spin-lattice coupling are estimated. It is found that the spin-lattice coupling is important to explain the slow growth of a ferrimagnetic order. The present simulations were made possible by developing a new Monte Carlo algorithm, which accelerates slow Monte Carlo dynamics of quasi-one-dimensional frustrated systems.
11 pages, 11 figures

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Materials Science, Statistical Mechanics

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http://salesiana.dossiersoluciones.com/handle/123456789/170046

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0803.1710
 http://arxiv.org/abs/0803.1710
 Phys. Rev. B 78, 104422 (2008)
 doi:10.1103/PhysRevB.78.104422

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arXiv