A spin wave driven skyrmion-based diode on a T-shaped nanotrack

Area of Science:

• Spintronics
• Condensed Matter Physics
• Nanotechnology

Background:

• Spin wave propagation is key for nanoscale spintronic devices.
• Magnetic skyrmions, topologically stabilized by Dzyaloshinskii-Moriya interaction (DMI), interact with spin waves.
• Existing spintronic devices face limitations that necessitate novel designs.

Purpose of the Study:

• To propose and investigate a spin wave-driven skyrmion-based diode.
• To achieve unidirectional motion of magnetic skyrmions for device functionality.
• To explore the parameters influencing the diode's performance.

Main Methods:

• Utilizing a T-shaped ferromagnetic nanotrack to guide skyrmion motion.
• Exploiting the mid-arm region to prevent skyrmion reversal, mitigating the skyrmion Hall effect (SkHE).
• Analyzing micromagnetic interactions and potential gradients to induce longitudinal skyrmion motion.

Main Results:

• Demonstrated one-way skyrmion motion in the T-shaped nanotrack.
• Identified optimal excitation field ranges (0.07 T ≤ H0 ≤ 0.4 T, 60 GHz ≤ f ≤ 80 GHz) for diode functionality.
• Achieved a processing speed of approximately 100 m s⁻¹ at 60 GHz and 0.4 T.

Conclusions:

• The proposed spin wave-driven skyrmion diode successfully enables unidirectional motion.
• The device operates effectively within specific excitation field parameters.
• This work contributes to the development of advanced non-charge based magnetic devices for spintronics.