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Monte-Carlo Study on Phase Transitions of Ferroelectromagnets

Phase transitions of ferroelectromagnetic mode systems are studied by Monte Carlo simulation method. The results show that both magnetoelectric coupling and electrical field can result in a weak ferromagnetic order. Anomalous behaviors of the magnetization and polarization and their susceptibilities near the critical point are observed. A mean-field approach is developed to explain the simulated results, showing a qualitative consistency between them.