Olav Hellwig

Focused He⁺ Ion Irradiation for Deterministic Nanoscale Domain Wall Pinning and Domain Nucleation in Current-Driven Magnetization Switching

Abstract Predictive domain wall nucleation, propagation, and pinning is achieved by He⁺ ion irradiation of spin-orbit torque thin film devices. Engineering the magnetic anisotropy landscape with nm precision, we demonstrate that non-irradiated gaps as small as 10 nm can act as re...

Magnetic reversal behavior and domain morphology in low-damping CoFeB/Ni multilayers

Perpendicularly magnetized multilayers (MLs) with low magnetic damping and highly periodic stripe domains are promising materials for energy-efficient spintronic and magnonic devices. Here, we investigate the structure, together with the static and dynamic magnetic properties of...