比较铁磁性钆钴合金丝中由自旋转移力矩和自旋轨道力矩驱动的电流诱导的畴壁运动

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
P. V. Thach, Satoshi Sumi, Kenji Tanabe, Hiroyuki Awano
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引用次数: 0

摘要

磁导线中的电流诱导畴壁运动(CIDWM)可以由自旋转移力矩(STT)驱动,STT 源自自旋极化导电电子的角动量转移到磁性 DW,SOT 源自重金属层中的自旋霍尔效应(SHE)以及在重金属层和磁性层之间的界面上产生的 Dzyaloshinsky Moriya(DMI)。在这项工作中,我们基于 SiN (10 nm)/GdFeCo (8 nm)/SiN (10 nm) 和 Pt (5 nm)/GdFeCo (8 nm)/SiN (10 nm) 结构,对 STT 和 SOT 驱动的具有磁垂直各向异性的铁磁性 GdFeCo 线中的 CIDWM 进行了比较研究。我们发现,由 SOT 驱动的 CIDWM 具有更低的临界电流密度 (JC) 和更高的 DW 迁移率 (µDW)。我们的工作可能有助于低功耗和高速存储器件的实现和开发。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparison of Current Induced Domain Wall Motion Driven by Spin Transfer Torque and by Spin Orbit Torque in Ferrimagnetic GdFeCo Wires
Current-induced domain wall motion (CIDWM) in magnetic wires can be driven by spin transfer torque (STT) originating from transferring angular momentums of spin-polarized conducting electrons to the magnetic DW and can be driven by spin orbit torque (SOT) originating from the spin Hall effect (SHE) in a heavy metal layer and Dzyaloshinsky Moriya (DMI) generated at an interface between a heavy metal layer and a magnetic layer. In this work, we carried out a comparative study of CIDWM driven by STT and by SOT in ferrimagnetic GdFeCo wires with magnetic perpendicular anisotropy based on structures of SiN (10 nm)/GdFeCo (8 nm)/SiN (10 nm) and Pt (5 nm)/GdFeCo (8 nm)/SiN (10 nm). We found that CIDWM driven by SOT exhibited a much lower critical current density (JC), and much higher DW mobility (µDW). Our work might be useful for the realization and the development of low-power and high-speed memory devices.
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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
期刊介绍: ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.
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