Architecture of 3D magnetic domain wall memory for suppressing bit-shift error

Abstract

We propose an architecture for the suppression of magnetic domain wall shift error in 3D magnetic domain wall memory, which utilizes the spatially modulated perpendicular magnetic anisotropy (PMA) of magnetic layers that are deposited on the side walls of multilayers of different oxide materials. We experimentally identified the oxide material candidates for such implementation and found that CrOx can generate the largest PMA while GdOx generates the smallest PMA of Pt/Co/Pt multilayers. Our proposed architecture can be a key to realizing 3D magnetic domain wall racetrack memory with low bit-shift error.