VCMA Gradient-Driven Skyrmion on a Trapezoidal Nanotrack for Racetrack Memory Application

VCMA Gradient-Driven Skyrmion on a Trapezoidal Nanotrack for Racetrack Memory Application

Magnetic skyrmion has great potential as information carriers in next-generation logic, neuromorphic computing, and memory devices because of its topological stability, incredibly compact size, and low current consumption required to operate it. In this work, the computational demonstration of a sky...

Full description

Saved in:
Bibliographic Details
Main Authors: Bikash Sharma, Pema Rinzing Bhutia, Ravish Kumar Raj, Bibek Chettri, Brajesh Kumar Kaushik, Sonal Shreya
Format: Article
Language:English
Published: IEEE 2025-01-01
Series:IEEE Open Journal of Nanotechnology
Subjects:
Magnetic tunnel junction
perpendicular magnetic anisotropy gradient
racetrack memory
skyrmion
trapezoidal nanotrack
Online Access:https://ieeexplore.ieee.org/document/10934757/
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Magnetic skyrmion has great potential as information carriers in next-generation logic, neuromorphic computing, and memory devices because of its topological stability, incredibly compact size, and low current consumption required to operate it. In this work, the computational demonstration of a skyrmion controlled by a voltage controlled magnetic anisotropy (VCMA) gradient on a trapezoidal nanotrack is studied for the application of racetrack memory. The trapezoidal nanotrack aids in guiding the skyrmion's motion under the anisotropy gradient by leveraging the edge repulsion force. By utilizing a defect, the proposed device ensures a continuous flow of binary bits &#x2018;0&#x2019; and &#x2018;1&#x2019; without any accumulation on the racetrack. The higher angle (<italic>&theta;<sub>high</sub></italic>) and higher anisotropy gradient (<italic>&#x0394;K<sub>u</sub><sub>-high</sub></italic>) of the trapezoidal nanotrack accelerates the skyrmion owing to higher edge repulsion force and energy gradient force. The maximum speed of 1.27 m&#x002F;s was achieved by the skyrmion, and the minimum time taken for the skyrmion to reach the detector from the nucleation point was 2.16 ns. The energy used to maintain the electric field is 4.58<italic>fJ</italic> per bit operation. This presents a novel approach to manipulate skyrmions under anisotropy gradient (<italic>&#x0394;K<sub>u</sub></italic>) on the trapezoidal nanotrack, paving the way for the development of improved skyrmion racetrack memory (sk-RM).
ISSN:2644-1292

Similar Items