Enhanced Spin-Orbit Torques in Graphene by Pt Adatoms Decoration

扫码查看

原文链接

万方数据

外文摘要：Graphene(Gr)with widely acclaimed characteristics,such as exceptionally long spin diffusion length at room temperature,provides an outstanding platform for spintronics.However,its inherent weak spin-orbit coupling(SOC)has limited its efficiency for generating the spin currents in order to control the magnetization switching process for applications in spintronics memories.Following the theoretical prediction on the enhancement of SOC in Gr by heavy atoms adsorption,here we experimentally observe a sizeable spin-orbit torques(SOTs)in Gr by the decoration of its surface with Pt adatoms in Gr/Pt(tpt)/FeNi trilayers with the optimal damping-like SOT efficiency around 0.55 by 0.6-nm-thick Pt layer adsorption.The value is nearly four times larger than that of the Pt/FeNi sample without Gr and nearly twice the value of the Gr/FeNi sample without Pt adsorption.The efficiency of the enhanced SOT in Gr by Pt adatoms is also demonstrated by the field-free SOT magnetization switching process with a relatively low critical current density around 5.4MA/cm2 in Gr/Pt/FeNi trilayers with the in-plane magnetic anisotropy.These findings pave the way for Gr spintronics applications,offering solutions for future low power consumption memories.

作者：

王怡飞、张其、徐海茗、郭玺、常宇晗、张健荣、和孝东、左亚路、崔宝山、席力

展开 >

作者单位：

Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education,Lanzhou University,Lanzhou 730000,China

基金：

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China111 ProjectOpen Research Fund of Songshan Lake Materials LaboratoryProgram for Changjiang Scholars and Innovative Research Team in University PCSIRTFundamental Research Funds for the Central UniversitiesNatural Science Foundation of Gansu Province

项目编号：

2021YFB35013049196320151671098B200632023SLABFN05IRT16R35lzujbky-2021-ct0122JR5RA474

出版年：

2024

DOI：

10.1088/0256-307X/41/6/067502

中国物理快报(英文版)

中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDEI

影响因子：0.515

ISSN：0256-307X

年,卷(期)：2024.41(6)