Read-write performance of CoPtCrO perpendicular media with high nucleation field

摘要

Perpendicular recording is expected as high areal density recording system because of strong thermal stability potential and highly efficient writing process. However, large demagnetizing fields in uniformly magnetized areas cause recording demagnetization and signal decrease with time. High nucleation field media can suppress these demagnetization problems. CoPtCrO perpendicular medium with high nucleation field successfully demonstrated the low noise performance. It shows less recording demagnetization and strong thermal stability CoPtCrO perpendicular medium exhibited good PER performance with ring head recording.