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Dynamic phase transition and universality in a quasi 2D system: Bilayer Ising/Blume-Capel ferromagnet on a honeycomb lattice

机译:在准2D系统中的动态阶段转换和普遍性:双层静态/布姆轮廓铁磁性蜂窝状格子

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摘要

Monte Carlo simulation technique is applied on a magnetic bilayer system composed of spin-1/2 Ising and spin-1 Blume-Capel spin variables distributed on a honeycomb lattice. Assuming an indirect exchange interaction between adjacent monolayers, we investigate the influence of single ion anisotropy and number of nonmagnetic layers between the magnetic sheets on the critical behavior of the system. Equilibrium phase diagram in a reduced pseudo critical temperature (T_c/J) versus reduced single ion anisotropy (D_B/J) plane has been determined. In the presence of alternating magnetic field, dynamic phase transition properties have been elucidated. The form of the oscillating magnetic field is assumed to be in a square wave form. By performing a detailed finite-size scaling analysis, we have calculated the critical half period t_1~c/2 at which the system undergoes a dynamic phase transition between dynamically ordered and disordered states. Extracted critical exponent ratios β/ν and γ/ν suggest that observed dynamic phase transition for the present multilayer system falls into the same universality class as the equilibrium two-dimensional Ising model.
机译:蒙特卡罗仿真技术应用于由Spin-1/2静脉和分布在蜂窝格子上的旋转-1 / 2静脉和旋转旋转变量组成的磁性双层系统。假设相邻单层之间的间接交换相互作用,我们研究了磁性板之间的单离子各向异性和非磁性层数对系统的临界行为的影响。已经确定了降低的伪临界温度(T_C / J)中的平衡相图(T_C / J)与减小的单离子各向异性(D_B / J)平面。在交替磁场的存在下,已经阐明了动态相转变特性。假设振荡磁场的形式以方形波形。通过执行详细的有限大小缩放分析,我们已经计算了关键半期T_1〜C / 2,在该临界半期T_1〜C / 2在动态有序和无序状态之间进行动态相位转换。提取的临界指数比β/ν和γ/ν表明,所观察到当前多层系统的动态相转变落入与平衡二维读数模型相同的普遍性等级。

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