Lithographic patterning of ferromagnetic FePt nanoparticles from a single-source bimetallic precursor containing hemiphasmidic structure for magnetic data recording media

Zhengong Meng, Cheuk Lam HO, Hon Fai Wong, Zhen Qiang Yu*, Nianyong ZHU, Guijun Li, Chi Wah Leung, Wai Yeung WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Patterning of L1 0 FePt nanoparticles (NPs) with high coercivity offers a promising route to develop bit-patterned media (BPM) for the next generation magnetic data recording system, but the synthesis of monodisperse FePt NPs and mass production of their nanopatterns has been a long-standing challenge. Here, highly efficient nanoimprint lithography was applied for large-scale universal patterning, which was achieved by imprinting the solution of a single-source bimetallic precursor. The rigid coplanar metallic cores and the surrounding flexible tails in the bimetallic complex permit the spontaneous molecular arrangements to form the highly ordered negative morphology replicated from the soft template. In-situ pyrolysis study was then investigated by one-pot pyrolysis of the precursor under an Ar/H 2 atmosphere, and the resultant NPs were fully characterized to identify the phase, morphology and magnetic properties. Finally, highly-ordered patterns on certain substrates were preserved perfectly after pyrolysis and could be potentially utilized in magnetic data recording media.

Original languageEnglish
Pages (from-to)566-576
Number of pages11
JournalScience China Materials
Volume62
Issue number4
DOIs
Publication statusPublished - 1 Apr 2019

Scopus Subject Areas

  • Materials Science(all)

User-Defined Keywords

  • FePt nanoparticles
  • lithographic patterning
  • magnetic data recording media
  • one-pot pyrolysis
  • single-source bimetallic precursors

Fingerprint

Dive into the research topics of 'Lithographic patterning of ferromagnetic FePt nanoparticles from a single-source bimetallic precursor containing hemiphasmidic structure for magnetic data recording media'. Together they form a unique fingerprint.

Cite this