| 摘要 |
This invention relates to a magnetic backlayer, and provides a magnetic backlayer giving a small spike noise spk and a small media noise Nm and exhibiting a large saturation magnetization Ms to have a good soft magnetic property. The magnetic backlayer is formed on a substrate; has a structure in that soft magnetic layers comprising iron and carbon as main components and nonmagnetic layers are alternately laminated; and has easy axes of magnetization in the in-plane direction of the film and the radius direction of the substrate.
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