Self-Oscillations in a Nanogap Spin Hall Nano-Oscillator with a Perpendicularly Magnetized External Film

Chen, Lina; Zhou, Kaiyuan; Tao, Zui; Gao, Zhenyu; Liang, Like; Li, Zishuang; Liu, R. H.

doi:10.1103/physrevapplied.19.054051

Phys. Rev. Applied

2023

DOI: 10.1103/physrevapplied.19.054051

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Self-Oscillations in a Nanogap Spin Hall Nano-Oscillator with a Perpendicularly Magnetized External Film

Lina Chen

Kaiyuan Zhou

Zui Tao

et al.

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Cited by 4 publications

References 56 publications

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Optimizing hybrid ferromagnetic metal–ferrimagnetic insulator spin-Hall nano-oscillators: A micromagnetic study

Xi,

Lai,

Kent

2024

Journal of Applied Physics

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Spin-Hall nano-oscillators (SHNOs) are nanoscale spintronic devices that generate high-frequency (GHz) microwave signals useful for various applications, such as neuromorphic computing and creating Ising systems. Recent research demonstrated that hybrid SHNOs consisting of a ferromagnetic metal (permalloy) and lithium ferrite-based (LAFO) insulating ferrimagnetic thin films have advantages in having lower auto-oscillation threshold currents (Ith) and generating larger microwave output power, making this hybrid structure an attractive candidate for spintronic applications. It is essential to understand how the tunable material properties of LAFO, e.g., its thickness, perpendicular magnetic anisotropy (Ku,LAFO), and saturation magnetization (Ms,LAFO), affect magnetic dynamics in hybrid SHNOs. We investigate the change in Ith and the output power of the device as the LAFO parameters vary. We find the Ith does not depend strongly on these parameters, but the output power has a highly nonlinear dependence on Ms,LAFO and Ku,LAFO. We further investigate the nature of the excited spin-wave modes as a function of Ku,LAFO and determine a critical value of Ku,LAFO above which propagating spin-waves are excited. Our simulation results provide a roadmap for designing hybrid SHNOs to achieve targeted spin excitation characteristics.

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Optimizing hybrid ferromagnetic metal–ferrimagnetic insulator spin-Hall nano-oscillators: A micromagnetic study

Xi,

Lai,

Kent

2024

Journal of Applied Physics

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Dynamical modes in a vertical nanocontact-based spin Hall nano-oscillator

et al. 2023

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Excitation and voltage-gated modulation of single-mode dynamics in a planar nanogap spin Hall nano-oscillator

Chen,

Gao

et al. 2023

Phys. Rev. B

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Self-Oscillations in a Nanogap Spin Hall Nano-Oscillator with a Perpendicularly Magnetized External Film

Cited by 4 publications

References 56 publications

Optimizing hybrid ferromagnetic metal–ferrimagnetic insulator spin-Hall nano-oscillators: A micromagnetic study

Optimizing hybrid ferromagnetic metal–ferrimagnetic insulator spin-Hall nano-oscillators: A micromagnetic study

Dynamical modes in a vertical nanocontact-based spin Hall nano-oscillator

Excitation and voltage-gated modulation of single-mode dynamics in a planar nanogap spin Hall nano-oscillator

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