Control of Domain Wall Position by Electrical Current in Structured Co/Ni Wire with Perpendicular Magnetic Anisotropy

摘要

We report the direct observation of the current-driven domain wall (DW)motion by magnetic force microscopy in a structured Co/Ni wire withperpendicular magnetic anisotropy. The wire has notches to define the DWposition. It is demonstrated that single current pulses can precisely controlthe DW position from notch to notch with high DW velocity of 40 m/s.