The role of a disordered interface between two ferromagnetic Ising systems in a transverse field

G. LeGal, A. Khater, T. Kaneyoshi

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    Abstract

    The phase diagrams of a disordered interface consisting of two mixed layers between two semi-infinite spin- 1 2 Ising ferromagnets (A and B) in a transverse field are investigated by the use of the effective-field theory. We have obtained some interesting results. (i) For zero transverse field, the increase of thickness in the interface with alloying disorder Ap - B1-p does not change the possibility of interface magnetism. (ii) In a finite transverse field, the critical exchange interaction at which the interface magnetism can appear may be affected severely, especially for the systems with pure (p = 0 and p = 1) interfaces, although the critical value of the disordered interface with 0.3≤ p ≤0.9 does not deviate so much from that of zero transverse field. (iii) The possibility of observing the interface magnetism experimentally is also proposed, applying a large transverse field.

    Original languageEnglish
    Pages (from-to)129-139
    Number of pages11
    JournalPhysica A: Statistical Mechanics and its Applications
    Volume209
    Issue number1-2
    DOIs
    Publication statusPublished - 15 Aug 1994

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    ASJC Scopus subject areas

    • Statistics and Probability
    • Condensed Matter Physics

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