L10-ordered FePtAg-C granular thin film for thermally assisted magnetic recording media (invited)

L. Zhang, Y. K. Takahashi, K. Hono, B. C. Stipe, J. Y. Juang, M. Grobis

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)

Abstract

We studied highly L10-ordered FePtAg-C nanogranular film as a potential high-density storage medium in thermally assisted magnetic recording (TAR). A 6.4-nm-thick FePtAg-C film with a perpendicular coercivity of 37 kOe and an average grain size of 6.1 ± 1.8 nm was fabricated on oxidized silicon substrate with a 10 nm MgO interlayer at 450 °C. The time-dependence measurement of remnant coercivity showed the energy barrier of Eb = 7.6 eV ∼300 kBT at room temperature, meaning the excellent thermal stability for long-term data storage. Static tester experiments on this film using a TAR head demonstrate the feasibility of recording at an areal density of ∼450 Gbits/in.2.

Original languageEnglish
Article number07B703
JournalJournal of Applied Physics
Volume109
Issue number7
DOIs
Publication statusPublished - 2011 Apr 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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