We study spin-transfer-torque-driven magnetization dynamics of a perpendicular magnetic tunnel junction nanopillar. Through the combined investigations on spin-torque ferromagnetic resonance and microwave spectroscopy, it is found that the free layer (FL) and the weak pinned reference layer (RL) exhibit distinct dynamic behaviors. First, frequency vs field dispersion for the FL and RL shows an opposite trend as the field varies. Second, the FL can support a single spin-wave (SW) mode for both parallel and antiparallel configurations, while the RL exhibits spin-wave excitation only for the antiparallel state. Those two SW modes coexist at the antiparallel state, and their oscillation frequency exhibits a crossover phenomenon with increasing the external magnetic field, which could be helpful in the mutual synchronization of auto-oscillations for SW-based neuromorphic computing.
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7 November 2022
Research Article|
November 04 2022
Current-driven magnetization dynamics and its correlation with magnetization configurations in perpendicularly magnetized tunnel junctions Available to Purchase
Kaiyuan Zhou;
Kaiyuan Zhou
(Data curation, Formal analysis, Investigation, Methodology, Software, Visualization, Writing – original draft, Writing – review & editing)
1
National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
, Nanjing 210093, China
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Lina Chen;
Lina Chen
(Funding acquisition, Methodology, Writing – original draft, Writing – review & editing)
2
School of Science, Nanjing University of Posts and Telecommunications
, Nanjing 210023, China
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Kequn Chi;
Kequn Chi
(Data curation, Resources, Validation)
3
Key Laboratory of Spintronics Materials, Devices and Systems of Zhejiang Province
, Zhejiang 311305, China
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Qingwei Fu;
Qingwei Fu
(Formal analysis, Methodology)
1
National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
, Nanjing 210093, China
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Zui Tao;
Zui Tao
(Writing – review & editing)
1
National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
, Nanjing 210093, China
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Like Liang
;
Like Liang
(Validation, Writing – review & editing)
1
National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
, Nanjing 210093, China
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Zhenyu Gao
;
Zhenyu Gao
(Writing – review & editing)
1
National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
, Nanjing 210093, China
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Haotian Li;
Haotian Li
(Software, Validation)
1
National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
, Nanjing 210093, China
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Hao Meng;
Hao Meng
(Funding acquisition, Resources)
3
Key Laboratory of Spintronics Materials, Devices and Systems of Zhejiang Province
, Zhejiang 311305, China
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Bo Liu;
Bo Liu
(Funding acquisition, Resources)
3
Key Laboratory of Spintronics Materials, Devices and Systems of Zhejiang Province
, Zhejiang 311305, China
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Tiejun Zhou;
Tiejun Zhou
(Funding acquisition, Resources)
4
Centre for Integrated spintronic devices, School of Electronics and Information, Hangzhou Dianzi University
, Hangzhou 310018, China
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R. H. Liu
R. H. Liu
a)
(Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing)
1
National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
, Nanjing 210093, China
a)Author to whom correspondence should be addressed: [email protected]
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Kaiyuan Zhou
1
Lina Chen
2
Kequn Chi
3
Qingwei Fu
1
Zui Tao
1
Like Liang
1
Zhenyu Gao
1
Haotian Li
1
Hao Meng
3
Bo Liu
3
Tiejun Zhou
4
R. H. Liu
1,a)
1
National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
, Nanjing 210093, China
2
School of Science, Nanjing University of Posts and Telecommunications
, Nanjing 210023, China
3
Key Laboratory of Spintronics Materials, Devices and Systems of Zhejiang Province
, Zhejiang 311305, China
4
Centre for Integrated spintronic devices, School of Electronics and Information, Hangzhou Dianzi University
, Hangzhou 310018, China
a)Author to whom correspondence should be addressed: [email protected]
J. Appl. Phys. 132, 173906 (2022)
Article history
Received:
August 31 2022
Accepted:
October 12 2022
Citation
Kaiyuan Zhou, Lina Chen, Kequn Chi, Qingwei Fu, Zui Tao, Like Liang, Zhenyu Gao, Haotian Li, Hao Meng, Bo Liu, Tiejun Zhou, R. H. Liu; Current-driven magnetization dynamics and its correlation with magnetization configurations in perpendicularly magnetized tunnel junctions. J. Appl. Phys. 7 November 2022; 132 (17): 173906. https://doi.org/10.1063/5.0107569
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