NM1/FM/NM2结构中自旋泵-逆自旋霍尔效应研究

项目名称： NM1/FM/NM2结构中自旋泵-逆自旋霍尔效应研究

项目编号： No.61471095

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 彭斌

作者单位： 电子科技大学

项目金额： 81万元

中文摘要： 本项目提出并研究非磁性金属1/铁磁/非磁性金属2多层膜结构（NM1/FM/NM2）中的自旋泵-逆自旋霍尔效应。首先采用一种微带夹具以及锁相技术搭建宽频测试平台，同时将铁磁薄膜中异常霍尔效应以及各向异性磁阻效应产生的自旋整流电压纳入到逆自旋霍尔效应的计算模型中，建立起自旋泵-逆自旋霍尔效应的准确测试方法。然后在此基础上，以微波磁场传感器作为应用背景，以NM1/FM/NM2结构为研究对象，优化选择不同铁磁和非磁金属材料，构建各种可调控的FM/NM界面，以研究不同铁磁材料特性、界面特性对自旋泵-逆自旋霍尔效应的影响规律，并探索其影响机制。通过本项目的研究，将澄清FM/NM结构在铁磁共振情形下各种物理效应的贡献，探索影响自旋泵效率的各种机制，设计并制备出自旋流转换效率高和逆自旋霍尔电压大的NM1/FM/NM2结构，为设计和开发基于自旋泵-逆自旋霍尔效应的新型微波磁场传感器提供理论依据。

中文关键词： 自旋泵；逆自旋霍尔效应；自旋电子学

英文摘要： The spin pumping and inverse spin hall effect in nonmagnetic metal 1/ferromagnet/nonmagnetic metal 2 structures (NM1/FM/NM2) will be studied in this proposal. At first, a microstrip fixture and lock-in technology will be used to realize a wide frequency measurement. The spin rectification contributions of both the anomalous hall effect and anisotropic magnetoresistance effect will be included in the inverse spin hall effect model, and then calculation method of the spin pumping-inverse spin hall effect will be develpoed. Based on the measurement method, the NM1/FM/NM2 structure will be studied aiming to the potential application of microwave magnetic field detector. The influences of the materials properties and the interfacial characteristics on the spin pumping-inverse spin hall effect will be researched with different FM and NM materials by constructing different FM/NM interfaces. This research can clarify the various physical effects in FM/NM structures under FMR conditions. The spin pumping mechanics will be explored and NM1/FM/NM2 structures with large spin current conversion efficiency and high inverse spin hall voltage will be designed and prepared. This research will support the design and develop of the new microwave magnetic field detector based on the spin pumping-inverse spin hall effect.

英文关键词： spin pumping;inverse spin hall effect;spintronics