外延生长金属单晶薄膜的自然共振频率与磁导率关系研究

项目名称： 外延生长金属单晶薄膜的自然共振频率与磁导率关系研究

项目编号： No.11274147

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 高存绪

作者单位： 兰州大学

项目金额： 86万元

中文摘要： 探索和研究具有高截止频率和高磁导率的磁性材料是目前国际上兴起的一个新的研究热点。本项目从单晶材料具有清晰物理特性的思路出发，以调控单晶金属薄膜的磁各向异性为手段，以深刻挖掘和研究材料的磁导率和共振频率之间的关系规律为目的展开研究。拟用分子束外延技术制备具有不同类型面内、面外磁各向异性的不同厚度、成分和晶体结构的金属单晶薄膜，结合结构和形貌观测，掌握磁各向异性可控的单晶金属薄膜的制备工艺。通过静态和动态磁性测量，掌握薄膜的磁各向异性特征和各种精确的磁性参数，利用转动磁化法获得薄膜的磁化强度随空间角度的变化，利用矢量分析仪和振动样品磁强计获得薄膜的共振频率和磁导率。结合以上数据，精确研究具有不同磁各向异性特征和参数的薄膜的磁导率和共振频率之间的关系规律。该研究可以挖掘材料的共振频率和磁导率依赖于不同各向异性类型的普适规律，为探索具有高截止频率和高磁导率的磁性材料提供理论和实验依据。

中文关键词： 磁各向异性；微波磁性；单晶；金属薄膜；调控磁性

英文摘要： Magnetic materials with high permeabilities at high frequencies have recently captivated the imagination of many researchers due to their novel functionalities over a range of applications in microwave communication. In this project, we will explore and investigate, experimentally and theoretically, the relationship between the permeability and resonance frequency of magnetic materials in the idea of controlling the magnetic anisotropy of single crystal metal films due to single crystal materials having clear physical properties. First of all, we intend to grow single crystal metal films with different thicknesses, components, crystal structures and magnetic anisotropies by molecular beam epitaxy. Then, we will study the growth techniques of single crystal metal films with controlled magnetic anisotropies by structural and morpholgical investigations, the magnetic anisotropies and accurate magnetic parameters by static and dynamic magnetic measurements, the magnetization variation with azimuthal angle by rotation magnetization method, the resonance frequencies and permeabilities of the films by vector network analyzer and vibrating sample magnetometer. Finally, with analyzing all of the data obtained, we will systematically analyze and investigate, experimentally and theoretically, the relationship between the p

英文关键词： Magnetic anisotropy；Microwave magnetic properties；Single crystal；Metal films；Magnetism control