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

Author

Zhang, Leiqi ; Takahashi, Yukiko K. ; Hono, Kazuhiro ; Stipe, Barry C. ; Juang, Jyh-Ching ; Grobis, Michael

Author_Institution

Nat. Inst. for Mater. Sci., Tsukuba, Japan

Volume

47

Issue

10

fYear

2011

Firstpage

4062

Lastpage

4065

Abstract

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 E_b=5.1 eV ~ 200 k_B T, meaning excellent thermal stability for long-term data storage. The static tester experiments by TAR head demonstrated an areal density of 550 Gb/in².

Keywords

carbon; coercive force; iron alloys; magnetic multilayers; magnetic recording; magnetic thin films; nanofabrication; nanomagnetics; nanostructured materials; platinum alloys; remanence; silver alloys; thermal stability; FePtAg-C; Si-MgO; energy barrier; nanogranular film; oxidized silicon substrate; perpendicular coercivity; remnant coercivity; temperature 550 degC; thermal stability; thermally assisted magnetic recording media; time-dependence measurement; Coercive force; Iron; Magnetic recording; Media; Silicon; Substrates; Thermal stability; FePt granular thin film; thermal stability; thermally assisted magnetic recording (TAR);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2157088

Filename

6027541