Effects of Crystallographic Orientation of CrNi Underlayer on Magnetic Properties of CoCrTa/CrNi Magnetic Recording Media deposited by E-Beam Evaporator

概要

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The magnetic properties change which was induced by a small amount of Ni addition into Cr underlayer and heat treatment in CoCrTa/CrNi thin film deposited by electron beam evaporator was investigated. The additional Ni element was found to be beneficial for increase in the coercivity of the film. The origin of coercivity increase was elucidated by crystal orientation and microstructure investigation using XRD and AFM respectively. It was found that the intensity of Cr (110) peak and the grain size were increased by Ni addition into the underlayer. The higher coercivity is related to the increase of Cr (110) peak in the underlayer and the reduction of Co (0002) peak in the magnetic layer. Coercivity was also increased after heat treatment above 400℃. The increase in coercivity may be resulted from the enhancement of Cr segregation by diffusion of Cr into the magnetic layer from underlayer.
社団法人電子情報通信学会の論文
1996-11-21