Surface acoustic waves increase magnetic domain wall velocity

Authors

Anil Adhikari, University of Nebraska-LincolnFollow
Shireen Adenwalla, University of Nebraska - LincolnFollow

ORCID IDs

A. Adhikari http://orcid.org/0000-0003-4258-6890

Date of this Version

1-2021

Citation

AIP Advances 11, 015234 (2021); doi: 10.1063/9.0000159

Comments

© 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

Abstract

Domain walls in magnetic thin films are being explored for memory applications and the speed at which they move has acquired increasing importance. Magnetic fields and currents have been shown to drive domain walls with speeds exceeding 500 m/s. We investigate another approach to increase domain wall velocities, using high frequency surface acoustic waves to create standing strain waves in a 3 micron wide strip of magnetic film with perpendicular anisotropy. Our measurements, at a resonant frequency of 248.8 MHz, indicate that domain wall velocities increase substantially, even at relatively low applied voltages. Our findings suggest that the strain wave derived effective magnetic field acts as an additional driver for domain wall motion.

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