Giant and Nonvolatile Control of Exchange Bias in Fe_3GeTe_2/Irradiated Fe_3GeTe_2/MgO Heterostructure Through Ultralow Voltage

Qingmei Wu; Yingying Zhang; Zhangzhang CuiPing LiuBin XiangZhengcao LiZhengping FuYalin Lu

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Giant and Nonvolatile Control of Exchange Bias in Fe_3GeTe_2/Irradiated Fe_3GeTe_2/MgO Heterostructure Through Ultralow Voltage

机译：Giant and Nonvolatile Control of Exchange Bias in Fe_3GeTe_2/Irradiated Fe_3GeTe_2/MgO Heterostructure Through Ultralow Voltage

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The discovery of van der Waals magnets has provided a new platform for theelectrical control of magnetism. Recent experiments have demonstrated thatthe magnetic properties of van der Waals magnets can be tuned by variousgate modulations, although most of them are volatile and require gate voltagesno lower than several volts. Here, the realization of nonvolatile controlof exchange bias and coercive fields in Fe_3GeTe_2/MgO heterostructures, andthe gate voltage is as low as tens of mV which is two orders of magnitudesmaller than those in previous experiments is presented. The discovery of anionic-irradiated phase formed in Fe_3GeTe_2 by MgO sputtering revealed that anexchange bias effect can be obtained in this heterostructure and tuned from≈700 to 0 Oe through voltages ranging from 5 to 20 mV. Owing to the highstability of oxidized Fe_3GeTe_2, the voltage-driven oxygen incorporated intoFe_3GeTe_2 from the irradiated phase induces a nonvolatile magnetism modulationthat can be retained after turning off the gate voltage. These findingsdemonstrate a methodology to modulate the magnetism of van der Waalsmagnets, opening new opportunities to fabricate all-solid, long-retention, andlow-dissipation nano-electronic devices using van der Waals materials.

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《Advanced functional materials》 |2023年第23期|2214007.1-2214007.8|共8页
作者
Qingmei Wu; Yingying Zhang; Zhangzhang CuiPing LiuBin XiangZhengcao LiZhengping FuYalin Lu;
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Department of Materials Science and Engineering, CAS Key Laboratoryof Materials for Energy ConversionUniversity of Science and Technology of ChinaHefei 230026, China Hefei National Research Center for Physical Sciences at the MicroscaleAnhui Laboratory of;

Department of Materials Science and Engineering, CAS Key Laboratoryof Materials for Energy ConversionUniversity of Science and Technology of ChinaHefei 230026, China;

State Key Laboratory for New Ceramics and Fine ProcessingKey Laboratory of Advanced Materials of Ministry of EducationSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084, ChinaHefei National Research Center for Physical Sciences at the MicroscaleAnhui Laboratory of Advanced Photon Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026, ChinaSchool of Science & New Energy Technology Engineering Laboratoryof Jiangsu ProvinceNanjing University of Posts and TelecommunicationsNanjing 210023, China;

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exchange biases; Fe_3GeTe_2; interlayer coupling; van der Waals magnets; voltage gating;

Giant and Nonvolatile Control of Exchange Bias in Fe_3GeTe_2/Irradiated Fe_3GeTe_2/MgO Heterostructure Through Ultralow Voltage

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