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

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


We studied highly L10 -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 Eb=5.1 eV∼ 200 kBT, meaning excellent thermal stability for long-term data storage. The static tester experiments by TAR head demonstrated an areal density of 550 Gb/in2.

Original languageEnglish
Article number6027541
Pages (from-to)4062-4065
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number10
Publication statusPublished - 2011 Oct


  • FePt granular thin film
  • thermal stability
  • thermally assisted magnetic recording (TAR)


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