Regensburg 2019 – scientific programme

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MA: Fachverband Magnetismus

MA 42: Focus Session: Curvilinear magnetism

MA 42.7: Talk

Thursday, April 4, 2019, 12:15–12:30, H38

Experimental and theoretical study of curvature effects in parabolic nanostripes — •Oleksii Volkov¹, Florian Kronast², Ingolf Mönch¹, Mohamad-Assaad Mawass², Attila Kákay¹, Jürgen Fassbender¹, and Denys Makarov¹ — ¹Helmholtz-Zentrum Dresden-Rossendorf e.V., Dresden, Germany — ²Helmholtz-Zentrum Berlin für Materialen und Energie, Berlin, Germany

Curvilinear magnetic objects are in the focus of intensive research due to the possibility to obtain new fundamental effects and stabilize topologically non-trivial magnetic textures at the nanoscale [1]. The physics in these systems is driven by the interplay between exchange and magnetostatic interactions, which contain spatial derivatives in their energy functionals. This makes both interactions sensitive to the appearance of bends and twists in the physical space.

Here, we address experimentally and theoretically curvature-induced effects in parabolic nanostripes with different geometrical parameters [2]. We show that two different magnetic states can appear: the homogeneous magnetic distribution along the parabolic stripe and a state with a transversal domain wall pinned at the vertex of the parabola. The analytical calculation, based on local magnetostatic model, showed its validity and applicability in a wide range of geometrical parameters.

[1] R. Streubel et al., J. Phys. D: Applied Physics 49, 363001 (2016).

[2] O. Volkov et al., Physica Status Solidi -- Rapid Research Letters, 1800309 (2018).