论文标题
铁磁性三元合金AB $_ρ$ c $ _ {1-ρ} $具有选择性位点障碍的磁性：混合旋转模型的案例研究
Magnetic behavior of a ferro-ferrimagnetic ternary alloy AB$_ρ$C$_{1-ρ}$ with a selective site disorder: the case study of a mixed-spin Ising model on a honeycomb lattice
论文作者
论文摘要
Phase transitions, compensation phenomenon and magnetization of a ferro-ferrimagnetic ternary alloy AB$_ρ$C$_{1-ρ}$ composed of three different kinds of magnetic ions A, B and C with the spin magnitude 1/2, 1 and 3/2 are examined within the framework of a mixed-spin Ising model on a honeycomb lattice with a selective annealed site disorder on one of its two sublattices。据认为，双分部分蜂窝晶格的第一个sublatice是由Spin-1/2磁离子形成的，而第二个Sublattice的位置则由具有概率$ρ$的Spin-1磁离子或Spin-3/2磁性离子随机占据，或者均具有概率$ 1-ρ$，两者都对UniaSiaxial Singlesion Anisosion andies anisosot进行。通过广义的星形三角变换，可以将所研究的模型精确地映射到三角形晶格上的有效自旋1/2 Ising模型中。对于Spin-1（Spin-3/2）磁离子的特异性浓度，证明了研究模型的铁铁磁性版本可能显示出补偿温度，在该温度下，总磁化强度在临界温度以下消失。对于单轴单离子各向异性的特异性值，临界温度显着地与随机混合自旋-1和Spin-3/2磁离子的浓度无关。自发性磁性阶在有限温度下通过高于无序基态的订购机制进行了明显恢复，这导致总磁化强度的异常温度依赖性，并具有双重重新进入相变。
Phase transitions, compensation phenomenon and magnetization of a ferro-ferrimagnetic ternary alloy AB$_ρ$C$_{1-ρ}$ composed of three different kinds of magnetic ions A, B and C with the spin magnitude 1/2, 1 and 3/2 are examined within the framework of a mixed-spin Ising model on a honeycomb lattice with a selective annealed site disorder on one of its two sublattices. It is supposed that the first sublattice of a bipartite honeycomb lattice is formed by the spin-1/2 magnetic ions, while the sites of the second sublattice are randomly occupied either by the spin-1 magnetic ions with a probability $ρ$ or the spin-3/2 magnetic ions with a probability $1-ρ$, both being subject to a uniaxial single-ion anisotropy. The model under investigation can be exactly mapped into an effective spin-1/2 Ising model on a triangular lattice through the generalized star-triangle transformation. For a specific concentration of the spin-1 (spin-3/2) magnetic ions, it is shown that the ferro-ferrimagnetic version of the studied model may display a compensation temperature at which the total magnetization vanishes below a critical temperature. The critical temperature strikingly may also become independent of the concentration of the randomly mixed spin-1 and spin-3/2 magnetic ions for a specific value of a uniaxial single-ion anisotropy. The spontaneous magnetic order may be notably restored at finite temperatures through the order-by-disorder mechanism above a disordered ground state, which results in an anomalous temperature dependence of the total magnetization with double reentrant phase transitions.
