Electric-field-driven domain wall dynamics in perpendicularly magnetized multilayers

摘要: We report on reversible electric-field-driven magnetic domain wall motion in a Cu/Ni multilayer ferroelectric BaTiO3 substrate. In our heterostructure, strain-coupling to ferroelastic domains with in-plane and perpendicular polarization the substrate causes formation of anisotropy, respectively, multilayer. Walls that separate are elastically pinned onto walls. Using magneto-optical Kerr effect microscopy, we demonstrate out-of-plane electric field pulses across move walls unison. Our experiments indicate an exponential increase velocity strength opposite for positive negative pulses. The application does not affect walls, but independently tailors their internal spin structure, causing change domain...