Preparation of Ba and Sr Ferrite Thin Films for Magnetic Disk Application

Abstract

Ba and Sr ferrite thin films with M-type magnetoplumbite hexagonal structure have the great advantage available to incorporate the magnetic disk recording layer without surface protective coating due to their highly chemical stability and wear durability. This paper reports the design criteria of thin film disk media, methods of film formation of Ba and Sr ferrite, heating techniques requiredfor crystallization, the investigation of grain size control.