Spin-orbit-torque-induced magnetic domain wall motion in Ta/CoFe nanowires with sloped perpendicular magnetic anisotropy

Abstract In materials with the gradient of magnetic anisotropy, spin-orbit-torque-induced magnetization behaviour has attracted attention because of its intriguing scientific principle and potential application. Most of the magnetization behaviours microscopically originate from magnetic domain wall...

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Autores principales:	Yue Zhang, Shijiang Luo, Xiaofei Yang, Chang Yang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f4fca24f596d475eb78088b6440d747f
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spelling	oai:doaj.org-article:f4fca24f596d475eb78088b6440d747f2021-12-02T12:32:05ZSpin-orbit-torque-induced magnetic domain wall motion in Ta/CoFe nanowires with sloped perpendicular magnetic anisotropy10.1038/s41598-017-02208-y2045-2322https://doaj.org/article/f4fca24f596d475eb78088b6440d747f2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02208-yhttps://doaj.org/toc/2045-2322Abstract In materials with the gradient of magnetic anisotropy, spin-orbit-torque-induced magnetization behaviour has attracted attention because of its intriguing scientific principle and potential application. Most of the magnetization behaviours microscopically originate from magnetic domain wall motion, which can be precisely depicted using the standard cooperative coordinate method (CCM). However, the domain wall motion in materials with the gradient of magnetic anisotropy using the CCM remains lack of investigation. In this paper, by adopting CCM, we established a set of equations to quantitatively depict the spin-orbit-torque-induced motion of domain walls in a Ta/CoFe nanotrack with weak Dzyaloshinskii–Moriya interaction and magnetic anisotropy gradient. The equations were solved numerically, and the solutions are similar to those of a micromagnetic simulation. The results indicate that the enhanced anisotropy along the track acts as a barrier to inhibit the motion of the domain wall. In contrast, the domain wall can be pushed to move in a direction with reduced anisotropy, with the velocity being accelerated by more than twice compared with that for the constant anisotropy case. This substantial velocity manipulation by anisotropy engineering is important in designing novel magnetic information devices with high reading speeds.Yue ZhangShijiang LuoXiaofei YangChang YangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yue Zhang Shijiang Luo Xiaofei Yang Chang Yang Spin-orbit-torque-induced magnetic domain wall motion in Ta/CoFe nanowires with sloped perpendicular magnetic anisotropy
description	Abstract In materials with the gradient of magnetic anisotropy, spin-orbit-torque-induced magnetization behaviour has attracted attention because of its intriguing scientific principle and potential application. Most of the magnetization behaviours microscopically originate from magnetic domain wall motion, which can be precisely depicted using the standard cooperative coordinate method (CCM). However, the domain wall motion in materials with the gradient of magnetic anisotropy using the CCM remains lack of investigation. In this paper, by adopting CCM, we established a set of equations to quantitatively depict the spin-orbit-torque-induced motion of domain walls in a Ta/CoFe nanotrack with weak Dzyaloshinskii–Moriya interaction and magnetic anisotropy gradient. The equations were solved numerically, and the solutions are similar to those of a micromagnetic simulation. The results indicate that the enhanced anisotropy along the track acts as a barrier to inhibit the motion of the domain wall. In contrast, the domain wall can be pushed to move in a direction with reduced anisotropy, with the velocity being accelerated by more than twice compared with that for the constant anisotropy case. This substantial velocity manipulation by anisotropy engineering is important in designing novel magnetic information devices with high reading speeds.
format	article
author	Yue Zhang Shijiang Luo Xiaofei Yang Chang Yang
author_facet	Yue Zhang Shijiang Luo Xiaofei Yang Chang Yang
author_sort	Yue Zhang
title	Spin-orbit-torque-induced magnetic domain wall motion in Ta/CoFe nanowires with sloped perpendicular magnetic anisotropy
title_short	Spin-orbit-torque-induced magnetic domain wall motion in Ta/CoFe nanowires with sloped perpendicular magnetic anisotropy
title_full	Spin-orbit-torque-induced magnetic domain wall motion in Ta/CoFe nanowires with sloped perpendicular magnetic anisotropy
title_fullStr	Spin-orbit-torque-induced magnetic domain wall motion in Ta/CoFe nanowires with sloped perpendicular magnetic anisotropy
title_full_unstemmed	Spin-orbit-torque-induced magnetic domain wall motion in Ta/CoFe nanowires with sloped perpendicular magnetic anisotropy
title_sort	spin-orbit-torque-induced magnetic domain wall motion in ta/cofe nanowires with sloped perpendicular magnetic anisotropy
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/f4fca24f596d475eb78088b6440d747f
work_keys_str_mv	AT yuezhang spinorbittorqueinducedmagneticdomainwallmotionintacofenanowireswithslopedperpendicularmagneticanisotropy AT shijiangluo spinorbittorqueinducedmagneticdomainwallmotionintacofenanowireswithslopedperpendicularmagneticanisotropy AT xiaofeiyang spinorbittorqueinducedmagneticdomainwallmotionintacofenanowireswithslopedperpendicularmagneticanisotropy AT changyang spinorbittorqueinducedmagneticdomainwallmotionintacofenanowireswithslopedperpendicularmagneticanisotropy
_version_	1718394193735319552

Spin-orbit-torque-induced magnetic domain wall motion in Ta/CoFe nanowires with sloped perpendicular magnetic anisotropy

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