Effect of Deposition Rate on Microstructure of CoCrPt-SiO{sub}2 Granular Longitudinal Media for Tape Applications

摘要

Introduction: SiO{sub}2 containing magnetic media is a promising candidate for obtaining magnetic grain decoupling to reduce media noise without heating or annealing for both longitudinal and perpendicular recording[1]. This type of media is of particular interest in magnetic tape applications, where the low temperature deposition is paramount to avoid substrate damage. An additional desirable feature of tape applications is the ability to deposit at high deposition rates to reduce the cost of tape production. Thus, this work focuses on the effect of deposition rate in the longitudinal version of this materials system. Since two phase segregation must occur during the sputter deposition process, it is anticipated that deposition rate may be a crucial deposition parameter, and that high deposit rates may not allow this segregation to proceed to completion in each layer of the depositing film before being buried by subsequent layers.