Magnetic skyrmions are small spherical whirls in the vector field of magnetization known for their hight stability. Typically, they can be found in thin films or magnetic multilayers featuring Dzyaloshinskii-Moriya interaction in combination with perpendicular magnetic anisotropy. Recently, number of theoretical studies and numerical simulations have shown a possibility of existence of in-plane skyrmions in magnetic thin layers with in-plane easy-axis magnetic anisotropy and interfacial DMI [1]. These topological defects known as in-plane skyrmions, or sometimes as asymmetric skyrmions [2], or bimerons substantially differ from their out-of-plane twins. Unlike skyrmions in systems with perpendicular magnetic anisotropy, the in-plane skyrmions of both topological charges (Q=±1) can simultaneously exist in the same magnetic domain. Importantly, in-plane magnetic skyrmions can interact with planar magnetic textures, like 90° pinned magnetic domain walls (DWs), which forms in hybrid multilayers consisted of ferromagnetic and ferroelectric layers [3,4]. In this seminar, we shall discuss possible applications of 90° magnetic DWs in future skyrmion-based spintronic devices [5].

[1] K.-W. Moon, J. Yoon, C. Kim, and C. Hwang, Phys. Rev. Appl. 12, 064054 (2019).
[2] A. O. Leonov, and I. Kézsmárki, Phys. Rev. B 96, 014423 (2017).
[3] B. V. de Wiele, S. J. Hämäläinen, P. Baláž, F. Montoncello, and S. van Dijken, Sci. Rep. 6, 1 (2016).
[4] P. Baláž, S. J. Hämäläinen, and S. van Dijken, Phys. Rev. B 98, 064417 (2018).
[5] P. Baláž, Phys. Rev. Applied 17, 044031 (2022).