Multicritical points in an Ising random-field model

Miron Kaufman, Philip E. Klunzinger, and A. Khurana
Phys. Rev. B 34, 4766 – Published 1 October 1986
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Abstract

The phase diagram of the mean-field Ising model in a random field obeying a symmetric three-peak distribution is determined. This distribution is relevant to diluted antiferromagnets in a uniform magnetic field. The phase diagram includes a fourth-order point, tricritical points, ordered critical points, critical end points, and a double critical end point. An ordered phase persists for arbitrarily large random fields at low temperatures.

  • Received 27 May 1986

DOI:https://doi.org/10.1103/PhysRevB.34.4766

©1986 American Physical Society

Authors & Affiliations

Miron Kaufman and Philip E. Klunzinger

  • Department of Physics, Cleveland State University, Cleveland, Ohio 44115

A. Khurana

  • Department of Physics, Princeton University, Princeton, New Jersey 08544

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Issue

Vol. 34, Iss. 7 — 1 October 1986

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