Zero-field skyrmion creation via surface acoustic waves
Abstract
We investigate the effect of high-frequency surface acoustic waves on skyrmion bubbles in Cr/Ta/Pt/CoFeB/Pt heterostructures on 128° Y cut lithium niobate. The as-deposited samples are in a single-domain state. Low-temperature annealing yields a multi-domain state, and a subsequent field sweep results in the nucleation of bubbles with significantly increased density in the presence of propagating or standing surface acoustic waves. This increase stems from the strain-driven modifications to the magnetic anisotropy that lowers the barriers to nucleation in pinning sites near the nucleation threshold.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (7)
A. Adhikari
Bryce Herrington
Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln 2 , Lincoln, Nebraska 68588,
R. Oliya
Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln 2 , Lincoln, Nebraska 68588,
L. Compton
Department of Physics, Colorado State University 3 , Colorado 80521,
K. Buchanan
Department of Physics, Colorado State University 3 , Colorado 80521,
R. Streubel
Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln 2 , Lincoln, Nebraska 68588,
S. Adenwalla
Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln 2 , Lincoln, Nebraska 68588,