In this work, IrMn-based perpendicular magnetic tunnel junctions (MTJs) are investigated. By inserting a thin W layer at an antiferromagnet/ferromagnet (AFM/FM) interface, we enhance the annealing temperature to 355 °C and obtain a high tunnel magnetoresistance ratio of 127%. Subsequently, field-free spin–orbit torque (SOT) switching of perpendicular MTJ is realized thanks to the in-plane exchange bias generated at the AFM/FM interface. Moreover, by applying a gate voltage, a coercive field is effectively decreased due to the voltage-controlled magnetic anisotropy (VCMA) effect. Finally, through the interplay of the SOT and VCMA effects, the critical switching current density is dramatically reduced by 73% (to 2.4 MA/cm2) and the total writing power consumption is decreased by 84% when a gate voltage of 0.76 V is applied. These findings pave the way for the practical applications of the IrMn-based perpendicular MTJs in low-power magnetic random-access memory.
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2 January 2023
Research Article|
January 03 2023
Voltage-gated spin-orbit torque switching in IrMn-based perpendicular magnetic tunnel junctions
Special Collection:
Magneto-ionic and electrostatic gating of magnetism: Phenomena and devices
Jiaqi Lu
;
Jiaqi Lu
(Data curation, Formal analysis, Investigation, Writing – original draft, Writing – review & editing)
1
Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University
, Beijing 100191, China
2
Hefei Innovation Research Institute, Beihang University
, Hefei 230013, China
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Weixiang Li
;
Weixiang Li
(Data curation, Formal analysis, Methodology, Resources, Writing – review & editing)
2
Hefei Innovation Research Institute, Beihang University
, Hefei 230013, China
3
Department of Electrical Engineering, Beihang University
, Beijing 100191, China
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Jiahao Liu
;
Jiahao Liu
(Data curation, Formal analysis, Investigation, Methodology, Resources, Writing – review & editing)
1
Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University
, Beijing 100191, China
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Zhaochun Liu
;
Zhaochun Liu
(Data curation, Formal analysis, Investigation)
1
Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University
, Beijing 100191, China
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Yining Wang
;
Yining Wang
(Data curation, Formal analysis, Investigation)
1
Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University
, Beijing 100191, China
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Congzheng Jiang;
Congzheng Jiang
(Data curation, Formal analysis, Investigation)
1
Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University
, Beijing 100191, China
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Jiabo Du;
Jiabo Du
(Data curation, Formal analysis)
1
Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University
, Beijing 100191, China
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Shiyang Lu;
Shiyang Lu
(Formal analysis, Resources)
1
Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University
, Beijing 100191, China
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Na Lei
;
Na Lei
(Supervision)
1
Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University
, Beijing 100191, China
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Shouzhong Peng
;
Shouzhong Peng
a)
(Conceptualization, Funding acquisition, Project administration, Supervision, Writing – review & editing)
1
Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University
, Beijing 100191, China
2
Hefei Innovation Research Institute, Beihang University
, Hefei 230013, China
a)Author to whom correspondence should be addressed: shouzhong.peng@buaa.edu.cn
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Weisheng Zhao
Weisheng Zhao
(Funding acquisition, Project administration, Supervision)
1
Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University
, Beijing 100191, China
2
Hefei Innovation Research Institute, Beihang University
, Hefei 230013, China
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a)Author to whom correspondence should be addressed: shouzhong.peng@buaa.edu.cn
Note: This paper is part of the APL Special Collection on Magneto-ionic and electrostatic gating of magnetism: Phenomena and devices.
Appl. Phys. Lett. 122, 012402 (2023)
Article history
Received:
September 30 2022
Accepted:
December 20 2022
Citation
Jiaqi Lu, Weixiang Li, Jiahao Liu, Zhaochun Liu, Yining Wang, Congzheng Jiang, Jiabo Du, Shiyang Lu, Na Lei, Shouzhong Peng, Weisheng Zhao; Voltage-gated spin-orbit torque switching in IrMn-based perpendicular magnetic tunnel junctions. Appl. Phys. Lett. 2 January 2023; 122 (1): 012402. https://doi.org/10.1063/5.0128865
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