Stabilization and control of topological magnetic solitons via magneticnanopatterning of exchange bias systems

Stabilizing and manipulating topological magnetic quasiparticles in thin films is ofgreat interest for potential applications in data storage and information processing.Here, we present a strategy for stabilizing magnetic vortices and Bloch lines withcontrolled position, vorticity, and chirality in a continuous exchange bias system. Bytailoring vectorially the unidirectional anisotropy of the system at the nanoscale, viathermally assisted magnetic scanning probe lithography, we show experimentally and viamicromagnetic simulations the non-volatile creation of vortex-antivortex pairs. Inaddition, we demonstrate the deterministic stabilization of cross and circular Bloch lineswithin patterned Néel magnetic domain walls. This work enables the implementation ofcomplex functionalities based on the control of tailored topological spin-textures inspintronic and magnonic nanodevices.