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Title: Enhancement of zero-field skyrmion density in [Pt/Co/Fe/Ir]2 multilayers at room temperature by the first-order reversal curve
Authors: Ma, Mangyuan
Ang, Calvin Ching Ian
Li, Yong
Pan, Zizhao
Gan, Weiliang
Lew, Wen Siang
Ma, Fusheng
Keywords: Science::Physics
Issue Date: 2020
Source: Ma, M., Ang, C. C. I., Li, Y., Pan, Z., Gan, W., Lew, W. S., & Ma, F. (2020). Enhancement of zero-field skyrmion density in [Pt/Co/FE/Ir]2 multilayers at room temperature by the first-order reversal curve. Journal of Applied Physics, 127(22), 223901-. doi:10.1063/5.0004432
Project: CRP9-2011-01
Journal: Journal of Applied Physics
Abstract: Magnetic skyrmions are novel topological spin textures on the nanoscale, and significant efforts have been taken to improve their zero-field density at room temperature (RT). In this work, we reported an approach of improving zero-field skyrmion density in [Pt/Co/Fe/Ir]2 multilayers at RT by using the first-order reversal curve (FORC) technique to obtain information on the irreversible or reversible behaviors in the magnetization switching process. It was found from the FORC diagram that the magnetization reversal mechanism can be characterized into three stages: (1) reversible labyrinth stripe domains expanding or shrinking stage; (2) irreversible stripe domains fracturing stage; and (3) irreversible skyrmion annihilation stage. Furthermore, the zero-field skyrmion density can be highly improved by choosing reversal fields from the irreversible stripe domains fracturing stage. The highest skyrmion density was approached according to the maximum FORC distribution ρ. Our results have established the FORC measurement as a valuable tool for investigating magnetic multilayers of high skyrmion densities.
ISSN: 0021-8979
DOI: 10.1063/5.0004432
Schools: School of Physical and Mathematical Sciences 
Rights: © 2020 The Author(s). All rights reserved. This paper was published by AIP Publishing in Journal of Applied Physics and is made available with permission of The Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
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