Irreversibility in random-field ferromagnets and diluted antiferromagnets
- 1 February 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 31 (3) , 1682-1685
- https://doi.org/10.1103/physrevb.31.1682
Abstract
Using the behavior of the free-energy surface, we compute the irreversibility phase diagram, history-dependent magnetization, and specific heat for three-dimensional diluted antiferromagnets (AF), and random-field Ising ferromagnets (RFIM). Domain-wall hysteresis is studied and found to be qualitatively different for the AF and RFIM. This suggests that impurity pinning plays a dramatic role in the dynamics of the former system. The onset of time-dependent long-range order and magnetization ‘‘anomalies’’ are predicted for certain regions of the phase diagram.Keywords
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