中国物理B(英文版)2024，Vol.33Issue(5) ：688-695.DOI:10.1088/1674-1056/ad2d55

Influence of exchange bias on spin torque ferromagnetic resonance for quantification of spin-orbit torque efficiency

赵乾 张腾飞 何斌 李子木 张森富 于国强 王建波 刘青芳 魏晋武
中国物理B(英文版)2024，Vol.33Issue(5) ：688-695.DOI:10.1088/1674-1056/ad2d55
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Influence of exchange bias on spin torque ferromagnetic resonance for quantification of spin-orbit torque efficiency

赵乾 1张腾飞 1何斌 2李子木 1张森富 1于国强 2王建波 3刘青芳 1魏晋武1
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作者信息

  • 1. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education,Lanzhou University,Lanzhou 730000,China
  • 2. Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China
  • 3. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education,Lanzhou University,Lanzhou 730000,China;Key Laboratory of Special Functional Materials and Structural Design,Ministry of Education,Lanzhou University,Lanzhou 730000,China
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Abstract

Antiferromagnet(AFM)/ferromagnet(FM)heterostructure is a popular system for studying the spin-orbit torque(SOT)of AFMs.However,the interfacial exchange bias field induces that the magnetization in FM layer is noncollinear to the external magnetic field,namely the magnetic moment drag effect,which further influences the characteristic of SOT efficiency.In this work,we study the SOT efficiencies of IrMn/NiFe bilayers with strong interfacial exchange bias by using spin-torque ferromagnetic resonance(ST-FMR)method.A full analysis on the AFM/FM systems with exchange bias is performed,and the angular dependence of magnetization on external magnetic field is determined through the minimum rule of free energy.The ST-FMR results can be well fitted by this model.We obtained the relative accurate SOT efficiencyξDL=0.058 for the IrMn film.This work provides a useful method to analyze the angular dependence of ST-FMR results and facilitates the accurate measurement of SOT efficiency for the AFM/FM heterostructures with strong exchange bias.

Key words

antiferromagnets/spin-orbit torque/exchange bias/spin torque ferromagnetic resonance

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基金项目

国家重点研发计划(2021YFB3601300)

国家自然科学基金(52201290)

国家自然科学基金(12074158)

国家自然科学基金(12174166)

中央高校基本科研业务费专项(lzujbky-2022-kb01)

出版年

2024
中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
参考文献量47
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