论文标题
蒙特卡洛研究尖晶石Znfe $ _2 $ o $ $ _4 $化合物的磁性特性研究
Monte Carlo study of the magnetic properties of the spinel ZnFe$_2$O$_4$ compound
论文作者
论文摘要
在这项工作中，通过使用Monte Carlo模拟（MCS）进行了对尖晶石ZnFe2O4的磁性行为的研究。铁原子在该材料中提供磁性。实际上，Fe3+离子的力矩的磁性自旋为s = 5/2。在这种情况下，我们提出了一个描述和建模该化合物的哈密顿量。首先，在零温度下，我们研究了系统的基态相图，以找到更稳定的配置。另一方面，对于非零温度值，我们获得了蒙特卡洛模拟的结果，即：磁性和敏感性是温度的函数。这些物理参数的行为显示出抗铁磁性行为，其肾温度约为tn = 12 k。发现该值与文献非常吻合。此外，研究并讨论了磁场的行为的变化，交换耦合相互作用和外部磁场的影响。为了完成这项研究，我们介绍了磁性磁滞回路，以推论ZnFe2O4化合物的抗磁性行为。
In this work, a study of the magnetic behavior of the spinel ZnFe2O4 is presented by using the Monte Carlo simulations (MCS). The iron atoms provide the magnetism in this material. In fact, the magnetic spin of moment of the Fe3+ ions is S=5/2. In this context, we propose a Hamiltonian describing and modeling this compound. Firstly, at zero temperature we have studied the ground state phase diagrams of the system in order to find the more stable configurations. On the other hand, for a non-null temperature values, we obtained the results of the Monte Carlo simulations, namely: the magnetizations and the susceptibilities as a function of temperature. The behavior of those physical parameters shows an anti-ferromagnetic behavior with a Neel-temperature of about TN=12 K. This value is found to be in good agreement with the literature. Moreover, the effect of varying the crystal field, the exchange coupling interactions and the external magnetic field is studied and discussed on the behavior of the magnetizations. To complete this study, we presented the magnetic hysteresis loops deducing the antiferromagnetic behavior of the ZnFe2O4 compound.
