L10 FePt-C nanogranular perpendicular anisotropy films with narrow size distribution

Alagarsamy Peruma, Yukiko K. Takahashi, Kazuhiro Hono

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

We report the study of L10 FePt-C nanogranular perpendicular anisotropy films fabricated on oxidized Si substrates with a (100) textured MgO Intermediate layer. The addition of a small amount of C (<12%) to a FePt (4nm) film results in the formation of interconnected FePt particles, while a higher C addition leads to the formation of well-isolated L10 FePt nanoparticles with a c-axis texture. The FePt particle size can be reduced to 5.5 nm with a size distribution of 2.3 nm in variance by adjusting FePt thickness. Perpendicular coercivity is controllable between 8 and 15 kOe with high squareness. These results demonstrate that the FePt-C system can accomplish a nanogranular structure suitable for ultrahigh density perpendicular recording media.

Original languageEnglish
Pages (from-to)1013011-1013013
Number of pages3
JournalApplied Physics Express
Volume1
Issue number10
DOIs
Publication statusPublished - 2008 Oct
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'L1<sub>0</sub> FePt-C nanogranular perpendicular anisotropy films with narrow size distribution'. Together they form a unique fingerprint.

Cite this