UK-Japanese Collaboration on Current-Driven Domain Wall Dynamics

英日在电流驱动畴壁动力学方面的合作

• 批准号: EP/J000337/1
• 负责人: Christopher Marrows
• 金额: $ 10.1万
• 依托单位: University of Leeds
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2011
• 资助国家: 英国
• 起止时间: 2011 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FJ000337%2F1
• 关键词: UK; Japanese; Collaboration; Current; Driven

The project will be a collaboration between theory (Japan) and experiment (UK). The effort of this project will be directed into study of the role of the spin-orbit interaction in current-driven spin torques in magnetic nanowires. Here we will tackle two main areas. The first is the use of spin-orbit coupling to induce spin-flip scattering and hence increase the so-called non-adiabatic (beta term) torque, which is field-like in symmetry. The second is to study the use of spin orbit coupling to introduce a current-dependent effective magnetic field through the Rashba effect. Both of these are outstanding mysteries of condensed matter physics, in that there is no predictive theory to allow materials and devices with appropriate parameters to be designed. They may also hold the key to the substantially more efficient spin-torques that will allow for lower power device operation. The project builds on existing programmes in the UK and Japan, in particular "Current-Driven Domain Wall Motion in Multilayer Nanowires" EPSRC grant EP/I011668/1 held by Dr Marrows and "Microscopic theory of spin transports", a JSPS Grant-in-Aid for Scientific Research (B) (Grant No. 22340104) held by Prof. Tatara. There is a natural complementarity between the experimental programme in the former and the programme of analytical and first-principles theory in the latter.

该项目将是理论（日本）与实验（英国）之间的合作。该项目的努力将针对研究自旋轨道相互作用在磁性纳米线中电流旋转扭矩中的作用。在这里，我们将解决两个主要领域。首先是使用自旋轨道耦合来诱导自旋叉散射，从而增加所谓的非绝热（beta术语）扭矩，该扭矩在对称性中类似于场。第二个是研究旋转轨道耦合的使用，通过RashBA效应引入依赖电流的有效磁场。这两者都是凝聚态物理学的杰出奥秘，因为没有预测理论允许设计具有适当参数的材料和设备。它们还可以掌握基本更有效的自旋折叠的钥匙，这将允许较低的电源设备操作。该项目建立在英国和日本的现有计划的基础上，尤其是“多层纳米线中的电流驱动的域壁运动” EPSRC授予EP/I011668/1由Marrows博士持有的“旋转运输理论”，JSPS Grant-IAD-IAD-IAD-IAD-IAD-IAD-IAD-IAD-IAD-IAD-IAD-IAD-IAD-IAD-IAD-IAD-IAD-IAD-IADICICIC RENSCECTION（B）（BANT 22340104010104）由PRIF PRIF PRAPARA持有。前者的实验计划与后者的分析和第一原理理论计划之间存在自然的互补性。

项目成果

Spin-orbit interaction enhancement in permalloy thin films by Pt doping

• DOI: 10.1103/physrevb.93.014432
• 发表时间: 2016-01
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: A. Hrabec;F. Goncalves;C. S. Spencer;E. Arenholz;A. N’Diaye;R. Stamps;C. Marrows

Current-driven dynamics of coupled domain walls in a synthetic antiferromagnet

• DOI: 10.1103/physrevb.90.094411
• 发表时间: 2014-07
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: H. Saarikoski;H. Kohno;C. Marrows;G. Tatara

Synthetic ferrimagnet nanowires with very low critical current density for coupled domain wall motion.

• DOI: 10.1038/s41598-017-01748-7
• 发表时间: 2017-05-09
• 期刊: Scientific reports
• 影响因子: 4.6
• 作者: Lepadatu S;Saarikoski H;Beacham R;Benitez MJ;Moore TA;Burnell G;Sugimoto S;Yesudas D;Wheeler MC;Miguel J;Dhesi SS;McGrouther D;McVitie S;Tatara G;Marrows CH
• 通讯作者: Marrows CH