Self-organised stripe domains and elliptical skyrmion bubbles in ultra-thin epitaxial Au0.67Pt0.33/Co/W(110) films
Abstract
We studied the symmetry of magnetic properties and the resulting magnetic textures in ultra-thin epitaxial Au0.67Pt0.33/Co/W(110), a model system exhibiting perpendicular magnetic anisotropy and interface Dzyaloshinskii–Moriya interaction (DMI). As a peculiar feature, the C2v crystal symmetry induced by the Co/W interface results in an additional uniaxial in-plane magnetic anisotropy in the cobalt layer. Photo-emission electron microscopy with magnetic sensitivity reveals the formation of self-organised magnetic stripe domains oriented parallel to the hard in-plane magnetisation 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 Néel domain wall configuration. The anisotropic domain wall energy also leads to the formation of elliptical skyrmion bubbles under a weak out-of-plane magnetic field.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 01, 2021
- Source ID
- 10.1088/1367-2630/abdbe0
Entities
People
- Andrea Locatelli
- Francesca Genuzio
- Hans T. Nembach
- Jan Vogel
- Jose Peña Garcia
- Justin M Shaw
- Lorenzo Camosi
- Olivier Fruchart
- Stefania Pizzini
- Tevfik Onur Menteş
Organizations
- Agence Nationale de la Recherche
- Defense Advanced Research Projects Agency
- Marie Skłodowska-Curie Actions