磁性多层膜中微波阻尼调制及对自旋泵浦效应影响研究

项目名称： 磁性多层膜中微波阻尼调制及对自旋泵浦效应影响研究

项目编号： No.61471096

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： 唐晓莉

作者单位： 电子科技大学

项目金额： 88万元

中文摘要： 电子自旋的微波动力学研究，使自旋电子器件由静磁场调制翻转特性研究向微波调制下的高频特性研究发展，也由此产生了自旋转矩、自旋泵浦、自旋霍尔、逆自旋霍尔等一系列新的自旋效应。这些自旋效应的产生、控制、探测等均与磁矩的进动密不可分，因而如何调制磁性薄膜的进动模式、阻尼系数、铁磁共振频率以及其对现有自旋电子器件的影响、对新一代自旋电子器件的开发等成为了目前微波自旋动力学研究的关键。因此本项目将立足于此，首先开展铁磁/非磁性/铁磁薄膜、铁磁/非磁性/铁磁/反铁磁多层薄膜体系中磁矩进动、铁磁谐振及其调控机理研究；其次，在理论指导下，研究非磁性层掺杂、交换偏置场调制、磁性层性能调制、缓冲层调整、层间扩散等对多层膜体系中微波阻尼系数、磁矩进动模式的影响，探寻有效调控薄膜阻尼系数及铁磁共振的可行方法；最后，基于对磁性多层膜阻尼系数的调制，研究其对自旋泵浦效应的影响，掌握调控自旋极化流注入的有效途径。

中文关键词： 自旋动力学；自旋泵浦；磁阻尼；铁磁谐振

英文摘要： The researches on spin dynamics in spintronics have shifted from static magnetic field-induced reverse to microwave-induced precession motion of the magnetization. Based on precession motion of the magnetization, a series of new spin phenomena, such as spin torque, spin pumping, spin Hall and inverse spin Hall have been proposed. These new phenomena are all extremely related to the precession motion of the magnetic moments. Therefore, the present research of spin dynamics has shifted to tailoring the precession, changing the damping parameters and studying its impact on the traditional spintronic devices. Based on this new development, our new proposal is planed to research as listed below. First, we will study on the precession mechanism and tailoring methods in ferromagnetic (FM)/normal metal (NM)/ferromagnetic film and FM/NM/FM/AFM (antiferromagntic) film. Based on the theoretical research, we will study the doping, controlling the exchange bias, changing the buffer layer and so on in magnetic multilayers and find the effcient way to tailor the damping and ferromagnetic resonance. In the end, we will research the impact of tailoring the damping on the spin pumping, and found the effect way to control the spin injection.

英文关键词： spin dynamics;spin pumping;magnetic damping;ferromagnetic resonance