Interactions between spin wave and magnetic domain structures

自旋波与磁畴结构之间的相互作用

• 批准号: 2104912
• 负责人: Luqiao Liu
• 金额: $ 40.8万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2104912&HistoricalAwards=false
• 关键词: Interactions; between; spin; wave; magnetic

Non-Technical DescriptionSpin wave is a useful way to transfer energy and information inside solid state materials. It is considered as one of the promising building blocks for next generation microelectronic technologies. Compared with existing computing devices, the ones based on spin wave can have lower power consumption, higher speed and are compatible with parallel operations. In order to realize computing devices based on spin wave, some bottlenecks need to be overcome. Particularly, one has to control the flow of spin wave inside solid materials. This project utilizes a novel mechanism to control the spin wave flow, which is intrinsically compact and consumes little energy. The fundamental knowledge achieved in this project has direct microelectronic applications and can lead to new device structures for information storage and computing. The research and education efforts ensure students at different levels benefit from the research and get trained to master cross-disciplinary techniques used in this project. The project not only educates and trains the next generation scientists and engineers but also assists to place them in microelectronic industry after graduation. Technical DescriptionThe study on the interactions between spin current and the dynamics of nanoscale magnetic structures has been a very active research area within spintronics. The non-uniform magnetic textures-induced magnetoresistance and the spin current-caused magnetic switching have both led to important industrial applications. However, existing research mostly employ conduction electrons to carry spin current. The other useful way of transferring spin angular momentum within solid state materials, i.e., to use spin wave, has remained largely unstudied experimentally, despite the theoretical prediction on the rich physics that can be caused by the interactions between spin wave and magnetic structures. This project focuses on quantitatively studying the influence of magnetic textures on the transport of magnon spin current, as well as the magnonic spin torque induced magnetic switching. Particularly, the project aims to achieve quantitative understanding between spin wave transport and the internal structures of domain wall as well as topological magnetic textures. The project enhances people’s understanding on the spin current transport enabled by magnons and results in new ways of controlling magnetic ordering in solids. This project has applications in microelectronic industry on making better interconnections and leads to new device schemes for information storage and computing. Integrated research and education efforts are established through the project so that students at K12, undergraduate and graduate levels benefit from the research, who are trained to master cross-disciplinary techniques used in this project, including material synthesis and characterization, nanoscale device fabrication and microwave circuit design and measurement.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

自旋波是固态材料内部传递能量和信息的一种有用方式。它被认为是下一代微电子技术的有前途的基石之一。与现有的计算设备相比，基于自旋波的计算设备可以具有更低的功耗、更高的速度和兼容并行操作。为了实现基于自旋波的计算设备，需要克服一些瓶颈。特别地，必须控制固体材料内的自旋波的流动。该项目利用一种新颖的机制来控制自旋波流，这是本质上紧凑，消耗很少的能量。在这个项目中获得的基础知识具有直接的微电子应用，并可能导致新的设备结构的信息存储和计算。研究和教育工作确保不同层次的学生从研究中受益，并接受培训，掌握该项目中使用的跨学科技术。该项目不仅教育和培训下一代科学家和工程师，而且还帮助他们毕业后进入微电子行业。自旋电流与纳米磁性结构动力学相互作用的研究一直是自旋电子学中一个非常活跃的研究领域。非均匀磁织构引起的磁电阻效应和自旋电流引起的磁开关效应都有重要的工业应用。然而，现有的研究大多采用传导电子携带自旋电流。在固态材料内传递自旋角动量的另一种有用方式，即，利用自旋波，仍然在很大程度上未经实验研究，尽管理论预测的丰富的物理，可以引起自旋波和磁结构之间的相互作用。本计画的重点是定量研究磁性织构对磁振子自旋电流输运的影响，以及磁振子自旋力矩引起的磁翻转。 特别是，该项目旨在实现自旋波输运和磁畴壁的内部结构以及拓扑磁性纹理之间的定量理解。该项目增强了人们对磁振子实现的自旋电流输运的理解，并导致控制固体中磁有序的新方法。该项目在微电子工业中具有更好的互连应用，并导致用于信息存储和计算的新器件方案。通过该项目建立了综合研究和教育工作，使K12，本科和研究生水平的学生受益于研究，他们接受培训，掌握该项目中使用的跨学科技术，包括材料合成和表征，该奖项反映了NSF的法定使命，并通过评估被认为值得支持使用基金会的知识价值和更广泛的影响审查标准。

项目成果

Handedness anomaly in a non-collinear antiferromagnet under spin–orbit torque

• DOI: 10.1038/s41563-023-01620-2
• 发表时间: 2023-08
• 期刊: Nature Materials
• 影响因子: 41.2
• 作者: Juyoung Yoon;Pengxiang Zhang;C. Chou;Y. Takeuchi;T. Uchimura;J. Hou;Jiahao Han;S. Kanai;Hideo Ohno;S. Fukami;Luqiao Liu

Spin-generation in magnetic Weyl semimetal Co2MnGa across varying degree of chemical order

• DOI: 10.1063/5.0102039
• 发表时间: 2022-08
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Taqiyyah S. Safi;C. Chou;J. Hou;Jiahao Han;Luqiao Liu

Coherent magnon-induced domain-wall motion in a magnetic insulator channel

磁绝缘体通道中相干磁振子引起的畴壁运动

• DOI: 10.1038/s41565-023-01406-2
• 发表时间: 2023
• 期刊: Nature Nanotechnology
• 影响因子: 38.3
• 作者: Fan, Yabin;Gross, Miela J.;Fakhrul, Takian;Finley, Joseph;Hou, Justin T.;Ngo, Steven;Liu, Luqiao;Ross, Caroline A.
• 通讯作者: Ross, Caroline A.