The effects of field history on magnetic skyrmion formation in [Pt/Co/Ir]3 multilayers

Clark, Andy T.; Wang, X.; Stuart, A. R.; Wang, Q.; Jiang, W.; Pearson, J. E.; te Velthuis, S. G. E.; Hoffmann, A.; Cheng, X. M.; Buchanan, K. S.

doi:10.1016/j.jmmm.2022.169951

The effects of field history on magnetic skyrmion formation in [Pt/Co/Ir]₃ multilayers

Journal Article · Wed Sep 14 00:00:00 EDT 2022 · Journal of Magnetism and Magnetic Materials

DOI:https://doi.org/10.1016/j.jmmm.2022.169951· OSTI ID:1908129

Clark, Andy T. ^[1]; Wang, X. ^[1]; Stuart, A. R. ^[2]; Wang, Q. ^[3]; Jiang, W. ^[4]; Pearson, J. E. ^[5]; te Velthuis, S. G. E. ^[5]; Hoffmann, A. ^[6]; Cheng, X. M. ^[1]; Buchanan, K. S. ^[2]

Bryn Mawr College, PA (United States)
Colorado State Univ., Fort Collins, CO (United States)
West Virginia Univ., Morgantown, WV (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States); Tsinghua Univ., Beijing (China)
Argonne National Laboratory (ANL), Argonne, IL (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)

Here, 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.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1908129

Alternate ID(s):: OSTI ID: 1960913

Journal Information:: Journal of Magnetism and Magnetic Materials, Journal Name: Journal of Magnetism and Magnetic Materials Vol. 563; ISSN 0304-8853

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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