SKM 2023 – scientific programme

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MA: Fachverband Magnetismus

MA 40: Poster Magnetism II

MA 40.2: Poster

Thursday, March 30, 2023, 14:00–16:00, P2/EG

Curvature-induced effects in dynamics of domain walls in chiral biaxail nanotubes — •Kostiantyn V. Yershov^1,2 and Denis D. Sheka³ — ¹Leibniz Institute for Solid State and Materials Research, Dresden, Germany — ²Bogolyubov Institute for Theoretical Physics, Kyiv, Ukraine — ³Taras Shevchenko National University of Kyiv, Ukraine

Tubular geometry is paradigmatic example for studying numerous chiral effect. The competition between intrinsic Dzyaloshinskii–Moriya interactions (DMI) and geometry-governed DMI become the source of emergent magnetochiral effects leading to essential modification of critical DMI strength, appearance of new type of domain walls (DWs) [1]. Here, we present a detailed study of static and dynamic properties of DWs in chiral biaxial nanotubes. The easy and hard axises are oriented in azimuthal and radial directions, respectively. (i) First, we considered the static properties of magnetic DWs in nanotubes with different symmetries of DMI. We found that the presence the chiral interaction results in the deformation of the DW profile: for interfacial type of DMI the DW phase has an asymmetrical slope; for bulk type of DMI the DW phase has a linear shift. In both cases deformation is proportional to the strength of DMI (ii) Dynamics of DWs with interfacial DMI results in the linear shift of the Walker field. While, for the case of the a bulk type of DMI we show that the presence of chiral interation results in the emergent magnetochiral effect, i.e. the polarity-helicity coupling. [1] K. Yershov et al, SciPost Phys. 9 (2020), 043.