Giant interfacial induced Dzyaloshinskii-Moriya interaction in polycrystalline Co/Pt multilayers

2021/01/07 by D. A. Tatarskiy, Tatarskiy, D. A., N. S. Gusev +3
Physics and Astronomy · Materials Science · #Magnetic properties of thin films #Theoretical and Computational Physics #Multiferroics and related materials

paper · pdf · doi:10.48550/arxiv.2101.02460

Abstract

Multilayers of heavy metals and ferromagnets are the basis for the formation of various structures with inhomogeneous chiral magnetic distributions. The most informative method for studying magnetic states in such structures with a high spatial resolution is Lorentz transmission electron microscopy (L-TEM). Here, we report on the observation of chiral Néel domain walls by means of L-TEM in Co/Pt multilayers with perpendicular magnetic anisotropy. We explain the existence of chiral Néel internal structure due to the overcritical, giant interfacial induced Dzyaloshinskii-Moriya interaction. Our results are confirmed by micromagnetic modeling, which allows taking into account the effect of local inhomogeneity of the magnetic anisotropy of polycrystalline films on formation of spin textures.

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