Anomalous Relaxation in the Random-Field Ising Model and Related Systems
- 11 July 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 61 (2) , 223-226
- https://doi.org/10.1103/physrevlett.61.223
Abstract
Anomalous relaxation observed in diluted antiferromagnets in a homogeneous external field at low temperature is explained for real, magnetic systems. For systems with weak crystal-field anisotropy the domain size is controlled by the Bruinsma-Aeppli mechanism and is field dependent, whereas bond randomness is irrelevant. If the anisotropy is strong the walls are pinned by random bonds. Random fields are merely responsible for readjustments of the interface on small scales explaining the relaxation of the magnetization after a decrease in the field.Keywords
This publication has 24 references indexed in Scilit:
- Random‐field ising systems: A survey of current theoretical viewsPhase Transitions, 1988
- Lower critical dimension for the random-field Ising modelPhysical Review Letters, 1987
- Phase transitions and metastable states in the presence of random fieldsPhysica A: Statistical Mechanics and its Applications, 1986
- Hysteresis, metastability, and time dependence in d=2 and d=3 random-field Ising systemsJournal of Applied Physics, 1985
- Lower Critical Dimension of the Random-Field Ising ModelPhysical Review Letters, 1984
- Equilibration of random-field Ising systemsPhysical Review B, 1984
- Nonequilibrium "Critical" Exponents in the Random-Field Ising ModelPhysical Review Letters, 1984
- Phase transitions in diluted magnets: Critical behavior, percolation, and random fieldsJournal of Statistical Physics, 1984
- Random-field effects in site-disordered Ising antiferromagnetsPhysical Review B, 1984
- Random field effects in disordered anisotropic antiferromagnetsJournal of Physics C: Solid State Physics, 1979