Vol.4 No.4 (July 2014)
Fabrication and Characterization of FePt-C Granular Thin Films
FePt-C granular thin film was fabricated on a thermally-oxidized silicon substrate by magnetron sputtering method. A MgO interlayer was applied to induce the L10 structure in the FePt alloy film. The addition of carbon can reduce the grain size of FePt. XRD, SQUID and TEM were applied to measure its structure, magnetic properties, and microstructures, respectively. Results show that the film has excellent L10 order, and the squareness of MH loop is close to unity, with a high per-pendicular coercivity of 12 kOe. The microstructure shows that it has small grain size of 8 nm with uniform distribution. This magnetic film is a promising candidate for magnetic recording media with ultra-high areal density.
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