STUDY ON INTERFACIAL FACTORS OF CoCrPtTa/CrTi THIN FILMS BY DIFFERENT INTERMEDIATE LAYER

概要

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To explore the role of the interface between underlayer and magnetic layer in Co alloy based media for ultra high recording density, two series of thin films with very thin intermediate layers were made. CrTi and CoCrPtTa were chosen for intermediate layer material as opposite extremes in terms of crystal lattice. The coercivity varied in a very broad range with the changing of working pressure for the intermediate layer while maintaining other sputtering condition. The pressure dependence for magnetic coercivity was quite different for these two kind of intermediate layer materials. Those films with CrTi intermediate layers showed abnormal periodical drops for coercivity value. It suggested that the different interface condition influence the epitaxy growth and hence magnetic properties by two ways: affecting on the grain boundary formation and stress related lattice variation.
社団法人電子情報通信学会の論文
1999-11-09