L10-ordered high coercivity (FePt)AgC granular thin films for perpendicular recording

Li Zhang, Y. K. Takahashi, A. Perumal, K. Hono

Research output: Contribution to journalArticlepeer-review

157 Citations (Scopus)

Abstract

We report (FePt)AgC granular thin films for potential applications to ultrahigh density perpendicular recording media, that were processed by co-sputtering FePt, Ag, and C targets on MgO underlayer deposited on thermally oxidized Si substrates. (FePt)1-xAgxyvol%C (0<x<0.2, 0<y<50) films were fabricated on oxidized silicon substrates with a 10 nm MgO interlayer at 450oC. We found that the Ag additions improved the L10 ordering and the granular structure of the FePtC films with the perpendicular coercivity ranging from 26 to 37 kOe for the particle size of 58 nm. The (FePt)0.9Ag0.150vol%C film showed the optimal magnetic properties as well as an appropriate granular morphology for recording media, i.e., average grain size of Dav=6.1 nm with the standard deviation of 1.8 nm.

Original languageEnglish
Pages (from-to)2658-2664
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume322
Issue number18
DOIs
Publication statusPublished - 2010 Sep
Externally publishedYes

Keywords

  • FePt granular thin film
  • L1 ordering
  • Magnetic perpendicular recording media

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'L1<sub>0</sub>-ordered high coercivity (FePt)AgC granular thin films for perpendicular recording'. Together they form a unique fingerprint.

Cite this