FePtAg-C Nanogranular Film as Thermally Assisted Magnetic Recording (TAR) Media

L. Zhang, Y. K. Takahashi, K. Hono, B. C. Stipe, J.-Y. Juang, M. Grobis
2011 IEEE transactions on magnetics  
We studied highly 1 0 -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 = 5 1 eV 200 B , meaning excellent thermal stability for long-term
more » ... lity for long-term data storage. The static tester experiments by TAR head demonstrated an areal density of 550 Gb/in 2 . Index Terms-FePt granular thin film, thermal stability, thermally assisted magnetic recording (TAR).
doi:10.1109/tmag.2011.2157088 fatcat:nafg2qb6dnfrznofghegbhth34