新型自旋转矩微波探测器的制备与性能研究

项目名称： 新型自旋转矩微波探测器的制备与性能研究

项目编号： No.11474311

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 曾中明

作者单位： 中国科学院苏州纳米技术与纳米仿生研究所

项目金额： 95万元

中文摘要： 基于自旋转移力矩效应的新型微波探测器具有尺寸小、灵敏度高、结构简单和易集成等优点,在微波检测、磁性传感、微波输能等领域具有广阔的应用前景。目前，自旋微波探测器的研究在国际上起步不久，无论是在器件制备、物性调控还是器件应用研究等方面均有待深入研究，其中提高探测灵敏度和消除对外加磁场的依赖是该领域的核心研究内容。本项目提出利用垂直磁各向异性材料构建磁性隧道结，研究基于该种结构的微制备及物理性质，特别是垂直磁各向异性场对微波响应特性的影响，并结合微磁学模拟等手段理解其物理内涵，为设计高灵敏度、无需磁场的自旋微波探测器件奠定物理和材料基础。该项目的顺利实施可为开发新型自旋电子材料和器件做出有益的探索及开拓。

中文关键词： 自旋电子学；自旋极化输运；磁性隧道结；磁电阻；磁共振

英文摘要： Spin-torque microwave detector (STMD) based on spin transfer torque effect has attracted intense attention for its potential applications in microwave detecting, magnetic sensing and microwave power transmission due to its unique characteristics such as device simplicity, nanoscale size, high sensitivity, and easy integration. Currently, the study of STMD is just emerging and needs exploration of lots of researches on device fabrication, manipulations of the physical properties and its typical applications.Improving sensitivity of the device and eliminating the need of external magnetic field are the essense of the research in this field. This project proposes a novel magnetic tunnelling junction devices using perpendicular magnetic anisotropy materials, and plan to study fabrication and microwave response properties of nanodevices.Particular attention is given to the effect of perpendicular magnetic anisotropy on the microwave signal response characteristics, as well as the internal mechanism by micromagnetic simulation, which will build the foundation for designing highly sensitive microwave detector without the use of magnetic field source. This work is of significance to the development of new spintronic materials and devices from the fundamental and practical view.

英文关键词： Spintronics;spin polarized transport;magnetic tunnel junction;magnetoresistance;ferromagnetic resonance