Formation of Reversed Magnetic Domains by Recording in a Co/Pd Multilayer Film with Perpendicular Magnetic Anisotropy

摘要

A Co/Pd multilayer film with perpendicular co- ercivity of 2.2kOe and remanence ratio (SQ) of unity was pre- pared by electron beam evaporation in vacuum. In the MFM im- age of signal patterns of 4kFRPI recorded using a ring-type MIG head, many reversed domains were observed. However, when the film was magnetized along the film normal direction using an elec- tromagnet (H=-13kOe), only few reversed magnetic domains were observed, which was consistent with SQ=1.