Study of the low-temperature behavior of a disordered antiferromagnet with random fields by the parallel-tempering method
Abstract
The parallel-tempering method has been applied to numerically study the thermodynamic behavior of a three-dimensional disordered antiferromagnetic Ising model with random fields at spin concentrations corresponding to regions of both weak and strong structural disorder. An analysis of the low-temperature behavior of the model convincingly shows that in the case of a weakly disordered samples there is realized an antiferromagnetic ordered state, while in the region of strong structural disorder the effects of random magnetic fields lead to the realization of a new phase state of the system with a complex domain structure consisting of antiferromagnetic and ferromagnetic domains separated by regions of a spin-glass phase and characterized by a spinglass ground state.
Keywords
Cite
@article{arxiv.0802.0072,
title = {Study of the low-temperature behavior of a disordered antiferromagnet with random fields by the parallel-tempering method},
author = {V. Prudnikov and A. Vakilov and E. Filikanov},
journal= {arXiv preprint arXiv:0802.0072},
year = {2008}
}
Comments
12 RevTeX pages, 8 figures