A Simultaneous Magneto-Dielectric Phase Transition in RbCoBr${}_3$

Abstract

We have modeled magneto-dielectric phase transitions in ABX${}_3$-type layered triangular lattice compounds. The model consists of a spin system (magnetic transition) and a lattice system (dielectric transition). Magnetic exchange interactions are supposed to change with a relative positionbetween two spins. This assumption produces an effective coupling between the lattice and the spin. Applying the nonequilibrium relaxation method, we have found that a simultaneous magneto-dielectric phase transition occurs when energy scales of the spin part and the lattice part coincide. An intermediate phase like the partial disordered phase disappears. Both systems relax frustration of the other system cooperatively and realize ordered states.

arXiv commentRevised, 15 pages, 9 figures

References in corpus (4)

• Non-equilibrium relaxation and interface energy of the Ising model
• Spin-Glass and Chiral-Glass Transitions in a $\pm J$ Heisenberg Spin-Glass Model in Three Dimensions
• Infinitesimal incommensurate stripe phase in an axial next-nearest-neighbor Ising model in two dimensions
• The antiferromagnetic order in an F-AF random alternating quantum spin chain : (CH_3)_2 CHNH_3 Cu(Cl_x Br_{1-x})_3

Cited by in corpus (5)

• Uniform Magnetic Order in a Ferromagnetic-Antiferromagnetic Random Alternating Quantum Spin Chain
• Nonequilibrium dynamic-correlation-length scaling method
• Phase Diagram of Lattice-Spin System RbCoBr${}_3$
• Spin-lattice model of Magneto-electric Transitions in RbCoBr${}_3$
• A strategy for solving difficulties in spin-glass simulations