A. A. Pastor, V. Dobrosavljevic, M. L. Horbach
Published 2001-07-20, updated 2002-05-15Version 2
The emergence of glassy behavior of the random field Ising model (RFIM) is investigated using an extended mean-field theory approach. Using this formulation, systematic corrections to the standard Bragg-Williams theory can be incorporated, leading to the appearance of a glassy phase, in agreement with the results of the self-consistent screening theory of Mezard and Young. Our approach makes it also possible to obtain information about the low temperature behavior of this glassy phase. We present results showing that within our mean-field framework, the hysteresis and avalanche behavior of the RFIM is characterized by power-law distributions, in close analogy with recent results obtained for mean-field spin glass models.
Comments: 21 pages, 5 incapsulated figures; final version, to appear in Phys. Rev. B (July 1, 2002)
Journal: Phys. Rev. B 66, 014413 (2002),
Chaos in the Random Field Ising Model
Zero Temperature Hysteresis in Random Field Ising Model on Bethe Lattices: approach to mean field behavior with increasing coordination number z
Experiments on the random field Ising model
