Enhanced field-driven domain-wall motion in Pt/ Co68 B32 /Pt strips

Abstract

It is now commonly accepted that materials exhibiting high perpendicular magnetic anisotropy are excellent candidates for devices based on current-induced domain-wall (DW) motion. A major hindrance of these materials however, is that they exhibit strong DW pinning. Here we report a significant increase in the field-driven DW velocity in Pt (4 nm) / Co68 B32 (0.6 nm) /Pt (2 nm) layers patterned into 900 nm wide strips. We compare the DW velocity between Co and Co68 B32 films and discuss the observed effects using the morphology of the films investigated by high-resolution transmission electron microscopy. © 2011 American Institute of Physics.