Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 42: Focus Session: Curvilinear magnetism

MA 42.2: Hauptvortrag

Donnerstag, 4. April 2019, 10:00–10:30, H38

Curvature-induced chiral effects in nanomagnets — •Oleksandr Pylypovskyi — Taras Shevchenko National University of Kyiv, Kyiv, Ukraine

Demand in scalable and energy saving devices for memory, computing and sensoric applications excites research in development of materials whose properties provide novel and more efficient ways for manipulation of spins and electrons. One of the perspective directions is the extension of planar films into the third dimension. The shape and topology of magnetic shell couples with a magnetic texture either via short- and long-range parts of magnetostatics or geometrically defined anisotropy axes in specifically prepared shells.

In this talk, we consider chiral effects in quasi-one dimensional magnets and curvilinear thin shells. The local curvature appears as an effective inhomogeneous antisymmetric exchange of the interfacial Dzyaloshinskii-Moriya interaction type and nonlocal magnetostatics-driven chiral interaction. In combination with geometry-induced anisotropy, it modifies ground state as well as statics and dynamics of topological solitons (domain walls and skyrmions).