The development of spintronic oscillators is driven by their potential applications in radio frequency telecommunication and neuromorphic computing. In this work, we propose a spintronic oscillator based on the chiral coupling in thin magnetic films with patterned anisotropy. With an in-plane magnetized disk imprinted on an out-of-plane magnetized slab, the oscillator takes a polar vortex-like magnetic structure in the disk stabilized by a strong Dzyaloshinskii–Moriya interaction. By means of micromagnetic simulations, we investigate its dynamic properties under applied spin current, and by placing an ensemble of oscillators in the near vicinity, we demonstrate their synchronization with different resonant frequencies. Finally, we show their potential application in neuromorphic computing using a network with six oscillators.
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31 May 2021
Research Article|
June 03 2021
Synchronization of chiral vortex nano-oscillators
Special Collection:
Mesoscopic Magnetic Systems: From Fundamental Properties to Devices
Zhiyang Zeng
;
Zhiyang Zeng
1
Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich
, 8093 Zurich, Switzerland
2
Laboratory for Multiscale Materials Experiments, Paul Scherrer Institut
, 5232 Villigen PSI, Switzerland
3
Yuanpei College, Peking University
, Beijing 100871, People's Republic of China
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Zhaochu Luo
;
Zhaochu Luo
1
Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich
, 8093 Zurich, Switzerland
2
Laboratory for Multiscale Materials Experiments, Paul Scherrer Institut
, 5232 Villigen PSI, Switzerland
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Laura J. Heyderman
;
Laura J. Heyderman
1
Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich
, 8093 Zurich, Switzerland
2
Laboratory for Multiscale Materials Experiments, Paul Scherrer Institut
, 5232 Villigen PSI, Switzerland
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Joo-Von Kim
;
Joo-Von Kim
4
Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay
, 91120 Palaiseau, France
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Aleš Hrabec
Aleš Hrabec
a)
1
Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich
, 8093 Zurich, Switzerland
2
Laboratory for Multiscale Materials Experiments, Paul Scherrer Institut
, 5232 Villigen PSI, Switzerland
5
Laboratory for Magnetism and Interface Physics, Department of Materials, ETH Zurich
, 8093 Zurich, Switzerland
a)Author to whom correspondence should be addressed: ales.hrabec@psi.ch
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a)Author to whom correspondence should be addressed: ales.hrabec@psi.ch
Note: This paper is part of the APL Special Collection on Mesoscopic Magnetic Systems: From Fundamental Properties to Devices.
Appl. Phys. Lett. 118, 222405 (2021)
Article history
Received:
February 25 2021
Accepted:
May 17 2021
Citation
Zhiyang Zeng, Zhaochu Luo, Laura J. Heyderman, Joo-Von Kim, Aleš Hrabec; Synchronization of chiral vortex nano-oscillators. Appl. Phys. Lett. 31 May 2021; 118 (22): 222405. https://doi.org/10.1063/5.0048672
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