Direct Preparation of Highly Ordered L10Phase FePt Nanoparticles and Their Shape-Assisted Assembly

Jian Ping Wang, Jiao Ming Qiu, T. A. Taton, Byeong Su Kim

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Chemically ordered L10 phase FePt nanoparticles has been considered one of the best candidates for future magnetic recording media with areal density beyond 1 Tbit/in2. However, current preparation methods via phase transformation must overcome many obstacles, including particle agglomeration, twinning and difficulty of easy axis alignment. In this paper, the direct preparation of L10 phase FePt nanoparticles without phase transformation and particles’ aqueous phase self-assembly are reported. The mechanism for L10 phase formation during nucleation and growth processes are discussed. The unique octahedron shape makes these highly ordered FePt nanoparticles even better choice for advanced magnetic recording media because they tend to form tilted and patterned media simultaneously due to the shape effect.

Original languageEnglish (US)
Pages (from-to)3042-3047
Number of pages6
JournalIEEE Transactions on Magnetics
Volume42
Issue number10
DOIs
StatePublished - Oct 2006

Keywords

  • Biomagnetic
  • FePt
  • L10 phase
  • SOMA
  • direct ordering
  • heat assisted recording media
  • magnetic particles
  • medicine
  • nanopar
  • patterned media
  • self-assembly
  • shape-assisted
  • ticle
  • tilted media

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