Mean field and Monte Carlo simulations techniques are applied to study the behavior of a mixed Ising spin model in a square lattice where spins 7/2 are located in alternating sites with spins 3/2. There is an antiferromagnetic interaction between nearest neighbors, ferromagnetic interactions between next‐nearest neighbors, crystal fields, and a magnetic external field. The role of the different interactions in the magnetic behavior of the system is explored. It is found that depending on the combination of parameters in the Hamiltonian this system presents multiple hysteresis loops, exchange bias, compensation temperatures, and discontinuous magnetizations. The results are compared with previous studies that do not include the ferromagnetic next‐nearest neighbor interactions and found that they can have a strong effect in the magnetic behavior of the system.

中文翻译：

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混合自旋（3 / 2,7 / 2）Ising型铁氧体：蒙特卡洛–均值磁场处理

应用均值场和蒙特卡洛模拟技术研究自旋7/2位于自旋3/2交替位置的方阵中混合Ising自旋模型的行为。最近的邻居之间存在反铁磁相互作用，最近的邻居之间存在铁磁相互作用，晶体场和外部磁场。探索了不同相互作用在系统磁行为中的作用。已经发现，根据哈密顿量中的参数组合，该系统呈现出多个磁滞回线，交换偏置，补偿温度和不连续磁化强度。