项目名称： 太赫兹波段反铁磁自旋泵浦效应的研究

项目编号： No.11504345

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 冯正

作者单位： 中国工程物理研究院电子工程研究所

项目金额： 24万元

中文摘要： 自旋泵浦效应作为一种产生自旋流的方法，是目前自旋电子学的研究热点。自旋泵浦效应存在于铁磁/非磁、亚铁磁/非磁体系；理论预言反铁磁/非磁体系中也存在此效应，但还未被实验证实。本项目拟在太赫兹波段开展反铁磁自旋泵浦效应的研究。基于太赫兹矢量网络分析仪、高功率太赫兹源等建立反铁磁共振谱测量和自旋输运测量装置；利用共面波导和准光方法，获得反铁磁/非磁样品的共振线宽展宽、反自旋霍尔电压，从而实验验证反铁磁自旋泵浦效应，理解和揭示自旋流的产生机理。本项目组在铁磁自旋泵浦方面积累了良好基础和丰富经验，具备开展工作的软硬件条件，期望在此项目上获得进展，丰富反铁磁自旋电子学的内涵，同时也促进太赫兹技术的研究。

中文关键词： 自旋流；自旋泵浦；反铁磁共振；反自旋霍尔效应；太赫兹波

英文摘要： Spin pumping is a method of generating spin current, which is one of the most popular issues in spintronics. Spin pumping effect has been found in ferromagnet(ferrimagnet)/nonmagnet bilayers. Recently it was also predicted to exist in antiferromagnet/nonmagnet systems, however, no experimental evidence has been reported. In this project, we plan to study antiferromagnetic spin pumping effect experimentally in the THz regime. A measurement system for antiferromagnetic resonance (AFMR) spectra and spin-transport will be built utilizing THz vector network analyzer and high power THz source, etc. Coplanar waveguide and quasi-optical methods will be employed in the experiments measuring the enhanced AFMR linewidth and the inverse spin Hall voltage. The experiments in this project aims to confirm the antiferromagnetic spin pumping effect, and to give a better understanding on the spin current generation mechanism. Rich experience has been accumulated in long-term pre-study of ferromagnetic spin pumping, which ensures the proceeding of this project. The confirmation of antiferromagnetic spin pumping will not only fertilize the field of antiferromagnetic spintronics, but also promote the progress of THz technology.

英文关键词： Spin current;Spin pumping;Antiferromagnetic resonance;Inverse spin Hall effect;THz wave