Influence of Sputtering Conditions on Perpendicular Magnetic Anisotropy in GdTbCo Amorphous Films

The effects of Ar pressure on GdTbCo film characteristics without bias voltage were studied. Sample films demonstrated a large perpendicular anisotropy (K
u
) which increased with the Tb contraction. In GdCo films, K
u
became less negative as the Ar pressure increased, but K
u
decreased in films containing Tb. Other results indicated that GdTbCo disks will be easy to manufacture.