Author's Final Manuscript
Journal of Magnetism and Magnetic Materials
We report on the formation of Néel-type magnetic bubble skyrmions at room temperature in [Pt/Co/Ir]3 multilayered thin films after an in-plane magnetic field treatment. Polar magneto-optical Kerr Effect (p-MOKE) microscopy images show that the dendritic magnetic configurations observed after AC demagnetization evolve into magnetic bubble skyrmions after the application and subsequent removal of an in-plane magnetic field. Micromagnetic simulations were used to systematically investigate the role of the in-plane magnetic field magnitude, misalignment of the sample, and the Dzyaloshinskii-Moriya interactions (DMI) in generating bubble skyrmions during the field treatment. The simulations show that in-plane fields slightly below the saturation field are the most effective at producing skyrmions, and, furthermore, a small field angle away from the sample plane not only leads to improved skyrmion formation but also provides a means to select the skyrmion polarity where the direction of the out-of-plane component of the field is opposite to the direction of the skyrmion cores. This field treatment scheme leads to a simple and reliable way to create magnetic bubble skyrmions in multilayered thin films with DMI.
"Andy T. Clark, X. Wang, A.R. Stuart, Q. Wang, W. Jiang, J.E. Pearson, S.G.E. te Velthuis, A. Hoffmann, X.M. Cheng, K.S. Buchanan. 2022. ""The effects of field history on magnetic skyrmion formation in [Pt/Co/Ir]3 multilayers."" Journal of Magnetism and Magnetic Materials 563."
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