Effect of Ta addition on magnetic properties of (Fe45Pt55)1?xTax thin films
It was studied that FePtTa thin films prepared on MgO (100) buffer-layer by DC/RF magnetron co-sputtering have shown better magnetic properties and micro structural improvement. The Ta-doped FePtTa films indicate somewhat differences in micro structural ordering and the aspect of grain growth after annealing. With respect to magnetic property, the sample having 30% increased coercivity was obtained after a heat treatment at 700C. In particular the addition of Ta (5.5%) enhances the L10 ordering of FePt at relatively high temperature (above 500C).
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