Yin, Haihong, Zheng, Xiangyu, Wang, Junlin orcid.org/0000-0002-0383-7864 et al. (14 more authors) (2021) Defect-correlated skyrmions and controllable generation in perpendicularly magnetized CoFeB ultrathin films. Applied Physics Letters. 062402. 062402. ISSN 0003-6951
Abstract
Skyrmions have attracted significant interest due to their topological spin structures and fascinating physical features. The skyrmion phase arises in materials with a Dzyaloshinskii–Moriya interaction at interfaces or in volume of non-centrosymmetric materials. Although skyrmions have been demonstrated experimentally, the general critical intrinsic relationship among fabrication, microstructures, magnetization, and the existence of skyrmions remains to be established. Here, two series of CoFeB ultrathin films with controlled atomic scale structures are employed to reveal this relationship. The amount of defects was artificially tuned by inverting the growth order, and skyrmions were shown to be preferentially formed in samples with more defects. By utilizing first-order reversal curves, the stable region and the skyrmion densities can be efficiently controlled in the return magnetization loops. These findings establish a general internal link from sample preparation to skyrmion generation and provide a general method for controlling skyrmion density.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 Author(s). Published under an exclusive license by AIP Publishing. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Electronic Engineering (York) The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 12 Aug 2021 09:20 |
Last Modified: | 21 Jan 2025 17:56 |
Published Version: | https://doi.org/10.1063/5.0057763 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1063/5.0057763 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:177042 |
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Description: Defect_Correlated_Skyrmions_and_Controllable_Generation_in_Perpendicularly_Magnetized_CoFeB_Ultrathin_Films