Issue 2, 2023

Antiferromagnetic skyrmion-based high speed diode

Abstract

Antiferromagnetic (AFM) skyrmions are favored over ferromagnetic (FM) skyrmions as they can be driven parallel to in-plane driving currents and eventually prevent the annihilation at the edges of nanotrack. In this study, an AFM skyrmion-based diode is proposed to realize the one-way skyrmion motion that is crucial for data processing in nanoelectronic and spintronic devices. The skyrmion transport is controlled by exploiting the staircase notch region in the middle of the nanotrack. By virtue of this, the micromagnetic interaction energy between the skyrmion and the notch edges generates a potential gradient that further gives rise to repulsive forces on the skyrmion. The resultant of the forces from the driving current and edge repulsions make the skyrmion move along the notch region to overcome the device window and reach the detection region. The notch is designed in such a way that it prevents the movement of the skyrmion in the reverse direction, thereby achieving diode functionality. The proposed device offers processing speed in the order of 103 m s−1, hence paving the way for the development of energy-efficient and high-speed devices in antiferromagnetic spintronics.

Graphical abstract: Antiferromagnetic skyrmion-based high speed diode

Supplementary files

Article information

Article type
Paper
Submitted
26 окт 2022
Accepted
16 ноя 2022
First published
15 дек 2022
This article is Open Access
Creative Commons BY license

Nanoscale Adv., 2023,5, 450-458

Antiferromagnetic skyrmion-based high speed diode

N. Bindal, R. K. Raj and B. K. Kaushik, Nanoscale Adv., 2023, 5, 450 DOI: 10.1039/D2NA00748G

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