Abstract
With the aim of applying to a soft magnetic underlayer of the double-layered perpendicular magnetic recording media, an Fe 74.9B 17.5Si 2.5Nb 5.1 alloy thin film was fabricated on Si substrate by a pulsed laser deposition method. The Fe-based alloy thin film of 200 nm in thickness was confirmed as a glassy structure. The thermal properties of the thin film have similar features to those for the melt-spun glassy alloy ribbon. The glassy alloy thin film exhibits good soft magnetic properties, i.e., high B s of 1.2 T and in-plane low H c of 134 A/m. The Fe–B–Si–Nb glassy alloy thin film is expected to be suitable for the soft magnetic underlayer material in the double-layered perpendicular magnetic recording media.
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