金属磁性材料的拓扑结构与电磁性能

项目名称： 金属磁性材料的拓扑结构与电磁性能

项目编号： No.51331006

项目类型： 重点项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 张志东

作者单位： 中国科学院金属研究所

项目金额： 304万元

中文摘要： 本项目深入研究拓扑学与金属磁性材料的磁性以及其它物理性能的关系，探索和设计新型具有不同拓扑结构的金属磁性材料，研究拓扑绕数、拓扑不变量、拓扑相因子等对金属材料磁性、电磁性能和输运性质的影响。研究金属薄膜、多层膜、纳米点（以及纳米盘、颗粒等）不同纳米结构中存在的自发自旋拓扑结构，通过研究不同的能量之间的竞争关系，研究其中存在的拓扑基态、激发态和亚稳态。研究金属磁性材料中不同自旋拓扑结构之间的相变。研究温度、外磁场等对自旋拓扑结构的影响。研究不同类型的磁场下自旋拓扑结构变化的动力学行为。研究不同纳米结构中的磁畴结构的拓扑性质，并分析它们与宏观磁性以及电磁性能的关联。通过调控材料的拓扑结构和自旋拓扑结构实现对金属磁性材料的磁性、电磁性能和输运性质的调控。建立与其它体系中拓扑效应的联系，从比较统一的角度深入理解拓扑效应的物理机制。

中文关键词： 磁性材料;电磁性能;拓扑结构;金属;自旋组态

英文摘要： This project will systematically investigate the relation between topological, magnetic and other physical properties of metallic magnetic materials. The purposes of this project are to design novel metallic magnetic materials with different topological structures, and to study the effect of winding numbers, topologic invariants and topologic phase factors on magnetic, electromagnetic and transport properties of the metallic magnetic materials. We will study the spontaneous spin topologic structure in metal films, multilayers, nanodots (or nanodiscs, nanoparticles, etc) with different nanostructures. By inspecting the competition between different energies, we will study the topologic ground states, excitation states and metastable states in these materials. We will investigate the phase transitions between different spin topologic structures and the effect of temperature and magnetic field on the spin topologic structures in these metallic magnetic materials. We will study also the dynamic behaviors of spin topologic structures in magnetic fields of different types. We will analyze the topologic behaviors of magnetic domains in nanostructured materials, and their relations with magnetic and electromagnetic properties. We hope to realize the controlling of magnetic, electromagnetic and transport properties of the metallic magnetic materials by adjusting the topologic structures and the spin topologic structures. We will try to establish the relations between the topologic effect in other physical systems, and understand physical mechanisms of topologic effects from an unique point of view.

英文关键词： Magnetic materials;Electromagnetic properties ;Topological structure;Metals;Spin configurations