Superconducting imprint of magnetic textures in ferromagnets with perpendicular magnetic anisotropy



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Sander, A. and Orfila, G. and Sánchez Manzano, D. and Reyren, N. and Mawass, M. A. and Gallego, F. and Collin, S. and Bouzehouane, K. and Hoeflich, K. and Kronast, F. and Grilli, F. and Rivera Calzada, Alberto Carlos and Santamaría Sánchez-Barriga, Jacobo and Villegas, J. E. and Valencia, S. (2021) Superconducting imprint of magnetic textures in ferromagnets with perpendicular magnetic anisotropy. Scientific reports, 11 (1). ISSN 2045-2322

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Research on proximity effects in superconductor/ferromagnetic hybrids has most often focused on how superconducting properties are affected-and can be controlled-by the effects of the ferromagnet's exchange or magnetic fringe fields. The opposite, namely the possibility to craft, tailor and stabilize the magnetic texture in a ferromagnet by exploiting superconducting effects, has been more seldom explored. Here we show that the magnetic flux trapped in high-temperature superconducting YBa_2Cu_3O_(7-delta) microstructures can be used to modify the magnetic reversal of a hard ferromagnet-a cobalt/platinum multilayer with perpendicular magnetic anisotropy-and to imprint unusual magnetic domain distributions in a controlled manner via the magnetic field history. The domain distributions imprinted in the superconducting state remain stable, in absence of an external magnetic field, even after increasing the temperature well above the superconducting critical temperature, at variance to what has been observed for soft ferromagnets with in-plane magnetic anisotropy. This opens the possibility of having non-trivial magnetic configuration textures at room temperature after being tailored below the superconducting transition temperature. The observed effects are well explained by micromagnetic simulations that demonstrate the role played by the magnetic field from the superconductor on the nucleation, propagation, and stabilization of magnetic domains.

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©The Author(s) 2021
The research leading to this result has been supported by the project CALIPSOplus under the Grant Agreement 730872 from the EU Framework Programme for Research and Innovation HORIZON 2020. Work at Unite Mixte de Physique CNRS/Thales supported by the ERC Grant No 647100 "SUSPINTRONICS", French ANR-17-CE30-0018-04 "OPTOFLUXONICS", and European COST action 16218 "Nanocohybri". KH acknowledges support from the EU COST action CA19140 'FIT4NANO', He ion microscopy was performed within the CoreLab Correlative Microscopy and Spectroscopy of Helmholtz Zentrum Berlin. GO, AR and JS acknowledge projects, Y2020/NMT-6661 PID2020-118078RB-I00 and Flag ERA ERA-NET To2Dox.

Uncontrolled Keywords:Flux-penetration; Element model; Thin-films; Field; Degradation
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:68687
Deposited On:16 Nov 2021 18:47
Last Modified:17 Nov 2021 08:30

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