Separation of Heating and Magnetoelastic Coupling Effects in Surface-Acoustic-Wave-Enhanced Creep of Magnetic Domain Walls

4Citations
Citations of this article
8Readers
Mendeley users who have this article in their library.

Abstract

Surface acoustic waves (SAWs) have significant potential for energy-efficient control of magnetic domain walls (DWs) owing to the magnetoelastic coupling effect. However, the dissipation of radio-frequency (rf) power in a SAW device can result in heating, which can also affect the DW motion. In this work, the heating of a SAW device consisting of a Pt/Co/Ta thin film with perpendicular magnetic anisotropy in between two interdigitated transducers is measured in situ with use of an on-chip Pt film as a thermometer within the SAW beam path. The application of SAWs at a center frequency of 48 MHz and a total rf power of 21 dBm results in a temperature increase of approximately 10 K within the SAW beam path owing to rf-power dissipation. DW velocity in a Pt/Co/Ta thin film is evaluated separately with use of Kerr microscopy at various temperatures or in the presence of SAWs. With a 10-K increase in temperature only, the DW velocity is found to increase from 33±3μm/s (at room temperature) to 104±8μm/s under an external magnetic field of 65 Oe. Traveling-SAW-assisted DW velocity (116±3μm/s) is slightly higher than that with a 10-K temperature increase alone, suggesting that the heating plays the major role in promoting DW motion, whereas the DW motion is significantly enhanced (418±8μm/s) in the presence of standing SAWs, indicating that magnetoelastic coupling is more important than heating in this scenario.

Cite

CITATION STYLE

APA

Shuai, J., Hunt, R. G., Moore, T. A., & Cunningham, J. E. (2023). Separation of Heating and Magnetoelastic Coupling Effects in Surface-Acoustic-Wave-Enhanced Creep of Magnetic Domain Walls. Physical Review Applied, 20(1). https://doi.org/10.1103/PhysRevApplied.20.014002

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free