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ABSTRACT: We studied highly L1<sub>0</sub> -ordered FePtAg-C nanogranular film as a potential high-density storage medium for thermally assisted magnetic recording (TAR). A 6.4-nm-thick FePtAg-C film was fabricated on an oxidized silicon substrate with a 10-nm MgO underlayer at 550°C, with the perpendicular coercivity of 35 kOe, and average grain size of 6.2 ± 1.4 nm. The time-dependence measurement of remnant coercivity results in the energy barrier E<sub>b</sub>=5.1 eV ~ 200 k<sub>B</sub> T, meaning excellent thermal stability for long-term data storage. The static tester experiments by TAR head demonstrated an areal density of 550 Gb/in<sup>2</sup>.
IEEE Transactions on Magnetics 11/2011; · 1.36 Impact Factor
