[黄昆论坛]第327期:Double-Resonant Raman Processes in Single Layer Graphe...
[黄昆论坛]第326期:Strategies toward High Efficiency Organic and Perovski...
[黄昆论坛]第325期:Piezotronics and Piezo-phototronics of Third Generatio...
[黄昆论坛]第324期:III-V Nanowires and Nanowire Devices Grown on Silicon ...
[黄昆论坛]第323期:Crystal Phase-Engineering of Novel Nanomaterials
[黄昆论坛]第322期: 等离激元光子学和纳米光学:超灵敏传感和纳米光波导研究
[黄昆论坛]第321期:New Physics and Model of Electrical Conduction of Pure...
[黄昆论坛]第320期:From Lead Halide Perovskites to Lead-Free Metal Halide...
第319期:氧化物的复杂磁畴结构:物理起源及其器件应用
第318期: Physics enabled by the discovery of spin-transfer torques
官方微信
友情链接

[黄昆论坛]第328期:Spin-Orbit Torques: Discoveries, Advances and Possibilities

2018-10-08

报告题目:Spin-Orbit Torques: Discoveries, Advances and Possibilities

报告人:Prof. Robert Buhrman (Applied Physics, Cornell University, USA)

报告时间:2018年10月10日 下午3:00

报告地点:现金捕鱼游戏|手机捕鱼游戏|真人捕鱼上下分学术会议中心

摘要:The discoveries early in this decade establishing that robust spin-orbit torques (SOT) can be exerted on the magnetic structure of a ferromagnetic thin film by charge flow in a thin film bilayer consisting of that ferromagnet and a heavy metal layer opened up a broad new exciting area of nanomagnetism research for fundamental studies and potential spintronics applications. Since then there have been many highly notable developments, including: (1) major advances in the understanding of the different possible origins of SOT and their range of characteristics; (2) the identification of new classes of materials that can provide strong spin currents and different types of SOT; (3) the demonstration of new concepts and approaches to effectively utilize SOT in a variety of ways for efficiently manipulating magnetism at the nanoscale; and (4) marked progress in both understanding and controlling the physics that degrade spin currents in heterostructures, and in enhancing the strength of SOT of conventional heavy metal systems through materials engineering. In this presentation I will focus largely on a selection of some of more recent developments in the first and last of these topic areas, particularly those that arguably show promise for possibly enabling a successful SOT technology in the relatively near term. Then in the last part of my presentation I will discuss some recent progress that has been made towards the effective demonstration of fast, reliable, low pulse current SOT switching of three terminal magnetic tunnel junction devices.

报告人简介: ROBERT BUHRMAN is the J.E. Sweet Memorial Professor in the School of Applied and Engineering Physics at Cornell University, where he previously also served in a number of academic and research leadership positions. Throughout his career Buhrman’s research activities have been in the area of electronic materials and devices, within what is now known as nanoscale science and engineering. His current research focus, beginning about twenty years ago, is on nanomagnetic materials and spintronics. Among the earlier contributions of Buhrman and his collaborators in this area was the use of Andreev reflection spectroscopy to determine the spin polarization of currents at ferromagnetic nanocontacts, initial demonstrations of reversible spin transfer torque switching, first in magnetic spin valve nanopillars and then in magnetic tunnel junctions, followed by the quantitative determination of spin transfer torques, and of dynamic spin torque excitation effects in spin valves, magnetic tunnel junctions and of vortices in magnetic nanostructures. More recently, Buhrman and his teammates established the existence of a giant spin Hall effect in Pt, beta-Ta and beta-W thin films, and demonstrated its effectiveness for applications in novel 3-terminal spin-orbit torque devices. Currently Buhrman and his Cornell colleagues are contributing to the worldwide effort that is seeking to better understand, control and enhance spin torques arising from spin-orbit interactions, and to advance their potential for technology applications.



关于我们
下载视频观看
联系方式
通信地址

北京市海淀区清华东路甲35号 北京912信箱 (100083)

电话

010-82304210/010-82305052(传真)

E-mail

semi@semi.ac.cn

交通地图
版权所有 ? 现金捕鱼游戏|手机捕鱼游戏|真人捕鱼上下分

备案号:京ICP备05085259号 京公网安备110402500052 中国科学院半导体所声明