论文标题
Spin-1/2中磁化量的热力学行为
Thermodynamic behaviour of magnetocaloric quantities in spin-1/2 Ising square trilayer
论文作者
论文摘要
研究了一个Spin-1/2，在Square Bravais晶格上使用Spining三层铁磁性系统，该系统采用单个Spin-Flip Metropolis算法采用蒙特卡罗模拟。这种系统的大部分是由三层形成的，每个层完全由A或B类型的原子组成，从而产生了两个不同的组成：ABA和AAB和两种不同类型的磁相互作用：类似原子和抗fifermagnetic之间的铁磁。对于这样的系统，降低残余磁化的反逆绝对是磁化强度与补偿点和临界点之间的磁化极值和饱和磁化的绝对值。对于一系列值，哈密顿量中相对相互作用强度的变化导致补偿点和临界点的变化以及降低残余磁化的逆绝对幅度的变化。在没有施加磁场的情况下，提出了补偿和控制参数的临界点之间的剩余磁性和温度间隔的逆绝对依赖性的可能数学形式，并获得了两种类型的构型的相图。对模拟系统的这种替代描述可以帮助技术人员根据所需的特性设计磁电材料。
A spin-1/2, Ising trilayered ferrimagnetic system on square Bravais lattice is studied, employing Monte-Carlo simulation with the single spin-flip Metropolis algorithm. The bulk of such a system is formed by three layers, each of which is composed entirely either by A or B type of atoms, resulting in two distinct compositions: ABA and AAB and two different types of magnetic interactions: ferromagnetic between like atoms and antiferromagnetic between unlike atoms. For such systems, Inverse Absolute of Reduced Residual Magnetisation is the absolute value of the ratio of the extremum of the magnetisation in between compensation and critical points and the saturation magnetisation. Variation of relative interaction strengths in the Hamiltonian, for a range of values, leads to the shift of compensation point and critical point and changes in the magnitude of Inverse absolute of Reduced Residual magnetisation. Probable mathematical forms of dependences of the Inverse absolute of Reduced Residual magnetisation and temperature interval between the compensation and critical points on controlling parameters were proposed in the absence of applied magnetic field and have obtained phase diagrams for both types of configurations from these relations. This alternative description of the simulated systems may help technologists design magnetocaloric materials according to desired characteristics.
