Driving skyrmions with low threshold current density in Pt/CoFeB thin film

Abstract Magnetic skyrmions are topologically stable spin swirling particle like entities which appealing for next generation spintronic devices. The expected low critical current density the motion of makes them potential candidates future energy efficient electronic Several heavy metal/ferromagnetic (HM/FM) systems have been explored in past decade to achieve faster skyrmion velocity at densities. In this context, we studied Pt/CoFeB/MgO heterostructures stabilized room temperature (RT). It has observed that shape perturbed even by small stray field arising from moment magnetic tips while performing force microscopy (MFM), indicating presence pinning landscape samples. This hypothesis is indeed confirmed threshold drive our sample, velocities few ?10 m s ?1 .