Metamagnets in uniform and random fields

Abstract

We study a two-sublattice Ising metamagnet with nearest and next-nearest-neighbor interactions, in both uniform and random fields. Using a mean-field approximation, we show that the qualitative features of the phase diagrams are significantly dependent on the distribution of the random fields. In particular, for a Gaussian distribution of random fields, the behavior of the model is qualitatively similar to a dilute Ising metamagnet in a uniform field.

14 pages, latex, 3 figures included

References in corpus (1)

• Scaling of the Random-Field Ising Model at Zero Temperature

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