Self-organised stripe domains and elliptical skyrmion bubbles in ultra-thin epitaxial Au{0.67}Pt{0.33}/Co/W(110) films - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue New Journal of Physics Année : 2021

Self-organised stripe domains and elliptical skyrmion bubbles in ultra-thin epitaxial Au{0.67}Pt{0.33}/Co/W(110) films

Lorenzo Camosi
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Stefania Pizzini
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Andrea Locatelli
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Jan Vogel

Résumé

We studied the symmetry of magnetic properties and the resulting magnetic textures in ultra-thin epitaxial Au$_{0.67}$Pt$_{0.33}$/Co/W, a model system exhibiting perpendicular magnetic anisotropy and interface Dzyaloshinskii-Moriya interaction (DMI). As a peculiar feature, the C$_\mathrm{2v}$ crystal symmetry induced by the Co/W interface results in an additional uniaxial in-plane magnetic anisotropy in the cobalt layer. Photoemission electron microscopy with magnetic sensitivity reveals the formation of self-organized magnetic stripe domains oriented parallel to the hard in-plane magnetization axis. We attribute this behavior to the lower domain wall energy when oriented along this axis, where both the DMI and the in-plane magnetic anisotropy favor a N\'{e}el domain wall configuration. The anisotropic domain wall energy also leads to the formation of elliptical skyrmion bubbles in a weak out-of-plane magnetic field.
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Dates et versions

hal-02907480 , version 1 (31-07-2020)
hal-02907480 , version 2 (30-01-2021)

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Lorenzo Camosi, José Peña-Garcia, Olivier Fruchart, Tevfik Onur Menteş, Stefania Pizzini, et al.. Self-organised stripe domains and elliptical skyrmion bubbles in ultra-thin epitaxial Au{0.67}Pt{0.33}/Co/W(110) films. New Journal of Physics, 2021, 23 (1), pp.013020. ⟨10.1088/1367-2630/abdbe0⟩. ⟨hal-02907480v2⟩
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