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Investigation of the Disordered Antiferromagnetic Ising Model with the Effects of Random Magnetic Fields

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Abstract

Computer simulation of phase transitions is made by the Monte Carlo method using a three-dimensional disordered antiferromagnetic Ising model in the external magnetic field. It is found that in the case where the spin concentration in a system is lower than a threshold one, the effects of random magnetic fields destroy the second-order phase transition and lead to the first-order phase transition into a new phase state of the system characterized by a ground spin-glassy state and metastable energy states at finite temperatures. The dependence of the threshold concentration on the external magnetic field is revealed.

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Authors and Affiliations

  1. Omsk State University, Russia

    V. N. Borodikhin, D. V. Dmitriev & V. V. Prudnikov

Authors
  1. V. N. Borodikhin
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  2. D. V. Dmitriev
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  3. V. V. Prudnikov
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Borodikhin, V.N., Dmitriev, D.V. & Prudnikov, V.V. Investigation of the Disordered Antiferromagnetic Ising Model with the Effects of Random Magnetic Fields. Russian Physics Journal 47, 534–538 (2004). https://doi.org/10.1023/B:RUPJ.0000046327.89036.8d

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  • DOI: https://doi.org/10.1023/B:RUPJ.0000046327.89036.8d

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