TY - JOUR
T1 - Magnetoelectric transitions of a distorted triangular-lattice antiferromagnet in a magnetic field
AU - Nakamura, Tota
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/8/9
Y1 - 2011/8/9
N2 - Large-scale Monte Carlo simulations are performed to analyze magnetoelectric transitions of a spin-lattice model in a magnetic field. The model explains well an experimental field-temperature phase diagram of RbCoBr3. The magnetic structure in each phase is determined. Simultaneous magnetoelectric transitions observed in the zero-field case are found to occur only in the low-field region, whereas magnetic transitions and electric transitions are decoupled in the high-field region. When the spin-lattice correlation is weak, an asymmetric ferrimagnetic state and a half-ferrimagnetic state appear. The former is the intermediate state between the partial-disordered state and the ferrimagnetic state. The latter phase is characterized by a sublattice order parameter with a ↑2-↑2-↓ ordering pattern.
AB - Large-scale Monte Carlo simulations are performed to analyze magnetoelectric transitions of a spin-lattice model in a magnetic field. The model explains well an experimental field-temperature phase diagram of RbCoBr3. The magnetic structure in each phase is determined. Simultaneous magnetoelectric transitions observed in the zero-field case are found to occur only in the low-field region, whereas magnetic transitions and electric transitions are decoupled in the high-field region. When the spin-lattice correlation is weak, an asymmetric ferrimagnetic state and a half-ferrimagnetic state appear. The former is the intermediate state between the partial-disordered state and the ferrimagnetic state. The latter phase is characterized by a sublattice order parameter with a ↑2-↑2-↓ ordering pattern.
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U2 - 10.1103/PhysRevB.84.054429
DO - 10.1103/PhysRevB.84.054429
M3 - Article
AN - SCOPUS:80052299966
SN - 0163-1829
VL - 84
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 5
M1 - 054429
ER -