Read/write simulation of Ba-ferrite particulate media

Abstract

A M-H loop model for Ba-ferrite particulate media is introduced where a modified Stoner–Wohlfarth model is used as a magnetization reversal model. It is confirmed that this model can be applied for read/write simulation of Ba ferrite. Using this model, the read/write performance of Ba-ferrite media is investigated and compared with that of acicular particulate media. The results indicate that: (i) For high-density recording, longitudinally oriented Ba ferrite is superior to acicular particulate media because of its high coercive squareness S*; (ii) to improve read/write performance of the Ba-ferrite in use today, narrowing of anisotropy field distribution is effective; and (iii) perpendicularly oriented Ba ferrite has good read/write performance only at narrow head-medium spacings.