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Anisotropic creep velocity of Dzyaloshinskii domain walls

We have measured the field-driven velocity of chiral Néel domain walls (DWs) stabilized by the Dzyaloshinskii–Moriya interaction (DMI) in a Pt/Co/Ta/Pt film with perpendicular magnetic anisotropy. A simple model based on the universal creep theory allows us to describe the anisotropic propagation of a DW along the contour of a bubble domain, driven by an out-of-plane field in the presence of a static in-plane field. This model is used to obtain the DMI constant from the measurement of the DW propagation with only one value of the in-plane field, simplifying the existing method relying on several measurements. The DMI constant extracted from the model is in good agreement with independent measurements

Tchilabalo Pakam, Assiongbon Adanlété Adjanoh, Serge Dzo Mawuefa Afenyiveh, Jan Vogel, Stefania Pizzini, Laurent Ranno

Applied Physics Letters 124, 092403 (2024)

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