Patterning of L10 FePt nanoparticles with ultra-high coercivity for bit-patterned media

L10-ordered FePt nanoparticles (NPs) with ultra-high coercivity were directly prepared from a new metallopolyyne using a one-step pyrolysis method. The chemical ordering, morphology and magnetic properties of the as-synthesized FePt NPs have been studied. Magnetic measurements show the coercivity of...

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Bibliographic Details
Published in:Nanoscale 2017-01, Vol.9 (2), p.731-738
Main Authors: Meng, Zhengong, Li, Guijun, Wong, Hon-Fai, Ng, Sheung-Mei, Yiu, Sze-Chun, Ho, Cheuk-Lam, Leung, Chi-Wah, Manners, Ian, Wong, Wai-Yeung
Format: Article
Language:English
Subjects:
Coercive force
Coercivity
Ferrous alloys
Intermetallics
Iron compounds
Media
Nanoparticles
Platinum compounds
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Summary:L10-ordered FePt nanoparticles (NPs) with ultra-high coercivity were directly prepared from a new metallopolyyne using a one-step pyrolysis method. The chemical ordering, morphology and magnetic properties of the as-synthesized FePt NPs have been studied. Magnetic measurements show the coercivity of these FePt NPs is as high as 3.6 T. Comparison of NPs synthesized under the Ar and Ar/H2 atmospheres shows that the presence of H2 in the annealing environment influences the nucleation and promotes the growth of L10-FePt NPs. Application of this metallopolymer for bit-patterned media was also demonstrated using nanoimprint lithography.
ISSN:2040-3364
2040-3372
DOI:10.1039/c6nr07863j