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.
Synchronization of chiral vortex nano-oscillators
Note: This paper is part of the APL Special Collection on Mesoscopic Magnetic Systems: From Fundamental Properties to Devices.
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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