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

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  • LeGal, G.
  • Khater, A.
  • Kaneyoshi, T.

Abstract

The phase diagrams of a disordered interface consisting of two mixed layers between two semi-infinite spin-12 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.

Suggested Citation

  • LeGal, G. & Khater, A. & Kaneyoshi, T., 1994. "The role of a disordered interface between two ferromagnetic Ising systems in a transverse field," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 209(1), pages 129-139.
    • Handle: RePEc:eee:phsmap:v:209:y:1994:i:1:p:129-139
    DOI: 10.1016/0378-4371(94)90053-1
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    References listed on IDEAS

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    1. Le Gal, G. & Kaneyoshi, T. & Khater, A., 1993. "Phase diagram and paramagnetic susceptibility of spin 32 Blume-Capel model in the correlated effective-field treatment," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 195(1), pages 174-187.
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    1. Ilkovič, V., 1996. "Cluster expansion for the spin-32 Blume-Capel model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 234(1), pages 545-553.

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