三角点阵基底上基于幂次相互作用的二维磁性团簇磁结构研究  

Simulation of Magnetic Cluster Growth on 2-D Triangular Lattice Based on Power Law Interaction

作　　者：吴一琦[1] 许晓军[2] 

机构地区：[1]温州大学瓯江学院,温州325035 [2]浙江工业大学应用物理系,杭州310014

出　　处：《真空科学与技术学报》2012年第1期63-67,共5页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金项目(批准号:10174063);浙江省教育厅资助项目(批准号:Y200803475)

摘　　要：在扩散限制凝聚模型基础上引入粒子的自旋自由度(包括自旋向上和向下),将自旋耦合系数扩展为随粒子间距离幂次变化的非常数项J/rα,采用Monte Carlo方法研究了在二维三角点阵基底上不同幂指数α以及耦合强度系数J值磁性粒子的分形生长规律,给出了此类磁性分形团簇的自旋分布、磁化强度等随模型参数的演化规律。The initial growth stage of the 2-dimmsion magnetic cluster on the triangular surface-lattice was modeled and simulated in Monte Carlo method,on the basis of the diffusion limited aggression（DLA） model.The original work is the addition of a spin freedom（up or down） to each particle involved in a power-law coupling interaction.In the simulation,the kinetic aggregation of the magnetic particles on 2-dimension lattice with different exponents,α,and different coupling parameters,J,were evaluated.In addition,the spin distributions and magnetizations of the magnetic fractal clusters,as well as their evolution with the parameters were calculated.Possible improvement of the simulation was tentatively discussed in a thought-provoking way.

关 键 词：幂次相互作用 扩散限制凝聚模型 自旋 

分 类 号：O555[理学—热学与物质分子运动论]