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

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

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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.

antiferromagnetsspin-orbit torqueexchange biasspin torque ferromagnetic resonance

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

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

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

Key Laboratory of Special Functional Materials and Structural Design,Ministry of Education,Lanzhou University,Lanzhou 730000,China

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国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金中央高校基本科研业务费专项

2021YFB3601300522012901207415812174166lzujbky-2022-kb01

2024

10.1088/1674-1056/ad2d55

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
年,卷(期)：2024.33(5)
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