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Spin hall nano-oscillators based on two-dimensional Fe3GeTe2 magnetic materials
Rongxin Li1, Ziyang Yu, Zhenhua Zhang
1Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China. xiongrui@whu.edu.cn.
Nanoscale
|November 11, 2020
Summary
We simulated microwave emissions in Fe3GeTe2/Pt spin Hall nano-oscillators (SHNOs). Results show spin-orbit torque can drive auto-oscillations above 30 GHz, tunable with current, indicating potential for low-power spintronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Two-dimensional (2D) magnetic materials like Fe3GeTe2 offer high perpendicular anisotropy, crucial for advanced spintronic devices.
- These materials promise enhanced performance and reduced power consumption in next-generation electronics.
Purpose of the Study:
- To investigate microwave emissions in Fe3GeTe2/Pt spin Hall nano-oscillators (SHNOs) with varying Fe3GeTe2 layer counts.
- To explore the potential of 2D magnetic materials in developing high-performance, low-power spintronic oscillators.
Main Methods:
- Utilized micromagnetic simulations to model Fe3GeTe2/Pt heterostructures.
- Analyzed auto-oscillation frequencies driven by spin-orbit torque (SOT) and their tunability with current.
Main Results:
- Predicted auto-oscillation frequencies exceeding 30 GHz, tunable via current.
- Observed non-localized spin-wave propagation with spatially varying wavelengths due to Joule heating.
- Identified unique bubble-like magnetic structures formed by magnetization dynamics.
Conclusions:
- Fe3GeTe2-based SHNOs demonstrate potential for future spintronic oscillators.
- The study highlights the viability of 2D magnetic materials for low-power, high-performance spintronic applications.
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