Significant improvement of magnetic properties and corrosion resistance in evaporated Co-Ni recording media |
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Authors: | Tada J. Akihiro M. Takei K. Satoh T. Suzuki T. |
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Affiliation: | Sumitomo Metal Mining Co. Ltd., Ichikawa, Japan; |
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Abstract: | An addition of a very small amount of Pr in Co-Ni films of a recording medium improves both corrosion resistance and frequency response. The columnar grains, which are induced by oblique incidence of evaporation, becomes remarkably finer by the addition of rare-earth elements. The TEM image of the cross section of the films shows a dense packed structure. High magnetization and a better corrosion resistance are considered to be due to the dense packed structure. The fine grain improves the frequency response. Among several rare-earth elements, especially Pr doping yields a best recording performance. |
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