Asymmetric Bubble Expansion in Pt/Co/MgO Layers with Dzyaloshinskii-Moriya Interaction |
| K. Richtera, b, R. Vargac
aInstitute of Physics, P.J. Safarik University, Park Angelinum 9, 041 54 Košice, Slovakia bInstitute of Materials Science, University of Kiel, Kaiserstr. 2, 24143 Kiel, Germany cCPM-TIP, P.J. Safarik University, Park Angelinum 9, 041 54 Kosice, Slovakia |
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| Magnetic skyrmions are particle-like spin structures of topological origin found in several magnetic materials, making them a promising candidate for current-driven memory devices. However, for applications, it is important to understand the origin of the large mass of skyrmions that affects strongly their trajectory during the propagation. Here we investigate the strength of the Dzyaloshinsky-Moriya interaction at the ferromagnetic/heavy metal interface. Our measurements are carried out by the method based on asymmetric bubble expansion. Magneto-optical Kerr effect studies are performed on two different samples of asymmetric Pt/Co/MgO with different MgO thickness, where a larger Dzyaloshinsky-Moriya interaction can be expected. |
DOI:10.12693/APhysPolA.137.741 topics: magnetic domain wall, skyrmions, thin magnetic layers |