Facile generation of L10-FePt nanodot arrays from a nanopatterned metallopolymer blend of iron and platinum homopolymers

Qingchen Dong, Guijun Li, Cheuk Lam Ho, Chi Wah Leung, Philip Wing Tat Pong, Ian Manners, Wai Yeung Wong

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

Hard ferromagnetic (L10 phase) FePt alloy nanoparticles (NPs) with extremely high magnetocrystalline anisotropy are considered to be one of the most promising candidates for the next generation of ultrahigh-density data storage system. The question of how to generate ordered patterns of L1 0-FePt NPs and how to transform the technology for practical applications represents a key current challenge. Here the direct synthesis of L10 phase FePt NPs by pyrolysis of Fe-containing and Pt-containing metallopolymer blend without post-annealing treatment is reported. Rapid single-step fabrication of large-area nanodot arrays (periodicity of 500 nm) of L10-ordered FePt NPs can also be achieved by employing the metallopolymer blend, which possesses excellent solubility in most organic solvents and good solution processability, as the precursor through nanoimprint lithography (NIL). Magnetic force microscopy (MFM) imaging of the nanodot pattern indicates that the patterned L10 phase FePt NPs are capable of exhibiting decent magnetic response, which suggests a great potential to be utilized directly in the fabrication of bit patterned media (BPM) for the next generation of magnetic recording technology. Rapid single-step fabrication of large-area nanodot arrays of L10-FePt nanoparticles (NPs) are achieved by employing a metallopolymer blend of individual Fe- and Pt-containing homopolymers as the precursor through nanoimprint lithography. Imaging of the nanodot pattern indicates that the patterned NPs exhibit a decent magnetic response, which suggests potential to be utilized directly in the fabrication of bit-patterned media for the next generation of magnetic recording technology.

Original languageEnglish (US)
Pages (from-to)857-862
Number of pages6
JournalAdvanced Functional Materials
Volume24
Issue number6
DOIs
StatePublished - Feb 12 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Biomaterials
  • General Materials Science
  • Condensed Matter Physics
  • Electrochemistry

Keywords

  • FePt nanoparticles
  • bit patterned media
  • magnetic data recording
  • metallopolymers
  • nanoimprint lithography

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