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

Abstract

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.

arXiv comment11 pages, 11 figures

References in corpus (7)

• Realization of the mean-field universality class in spin-crossover materials
• Ordered Phases and Phase Transitions in The Stacked Triangular Ising Antiferromagnet CsCoCl${}_3$ and CsCoBr${}_3$
• A cluster heat bath method on a quasi-onedimensional Ising model
• A quantum Monte Carlo algorithm realizing an intrinsic relaxation
• Cluster Heat Bath Algorithm in Monte Carlo Simulations of Ising Models
• A Simultaneous Magneto-Dielectric Phase Transition in RbCoBr${}_3$
• Phase Diagram of Lattice-Spin System RbCoBr${}_3$

Cited by in corpus (2)

• Efficient Monte Carlo algorithm in quasi-one-dimensional Ising spin systems
• A method to reduce the rejection rate in Monte Carlo Markov Chains