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

Zhengong Meng; Guijun Li; Hon Fai Wong; Sheung Mei Ng; Sze Chun Yiu; Cheuk Lam Ho; Chi Wah Leung; Ian Manners; Wai Yeung Wong

doi:10.1039/c6nr07863j

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

Zhengong Meng
, Guijun Li
, Hon Fai Wong
, Sheung Mei Ng
, Sze Chun Yiu
, Cheuk Lam Ho^*
, Chi Wah Leung^*
, Ian Manners^*
, Wai Yeung Wong^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

48 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	731-738
Number of pages	8
Journal	Nanoscale
Volume	9
Issue number	2
Early online date	29 Nov 2016
DOIs	https://doi.org/10.1039/c6nr07863j
Publication status	Published - 14 Jan 2017

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title = "Patterning of L10 FePt nanoparticles with ultra-high coercivity for bit-patterned media",

abstract = "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.",

author = "Zhengong Meng and Guijun Li and Wong, \{Hon Fai\} and Ng, \{Sheung Mei\} and Yiu, \{Sze Chun\} and Ho, \{Cheuk Lam\} and Leung, \{Chi Wah\} and Ian Manners and Wong, \{Wai Yeung\}",

note = "Funding Information: W.-Y. Wong thanks the Hong Kong Research Grants Council (HKBU 12302114), Areas of Excellence Scheme of HKSAR (AoE/P-03/08), National Natural Science Foundation of China (Project No. 51373145), Science, Technology, and Innovation Committee of Shenzhen Municipality (JCYJ20140419130507116), Hong Kong Baptist University (FRG2/13-14/083) and the Hong Kong Polytechnic University for financial support. C.-L. Ho thanks Hong Kong Baptist University (FRG2/13-14/078), and the Science, Technology and Innovation Committee of Shenzhen Municipality (JCYJ20140818163041143) for their financial support. We also thank the National Natural Science Foundation of China (project number: 21504074). The work in PolyU was supported by the Hong Kong Research Grants Council (PolyU 153015/14P) and PolyU (1-ZE14/1-ZE25).",

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doi = "10.1039/c6nr07863j",

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volume = "9",

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AU - Meng, Zhengong

AU - Li, Guijun

AU - Wong, Hon Fai

AU - Ng, Sheung Mei

AU - Yiu, Sze Chun

AU - Ho, Cheuk Lam

AU - Leung, Chi Wah

AU - Manners, Ian

AU - Wong, Wai Yeung

N1 - Funding Information: W.-Y. Wong thanks the Hong Kong Research Grants Council (HKBU 12302114), Areas of Excellence Scheme of HKSAR (AoE/P-03/08), National Natural Science Foundation of China (Project No. 51373145), Science, Technology, and Innovation Committee of Shenzhen Municipality (JCYJ20140419130507116), Hong Kong Baptist University (FRG2/13-14/083) and the Hong Kong Polytechnic University for financial support. C.-L. Ho thanks Hong Kong Baptist University (FRG2/13-14/078), and the Science, Technology and Innovation Committee of Shenzhen Municipality (JCYJ20140818163041143) for their financial support. We also thank the National Natural Science Foundation of China (project number: 21504074). The work in PolyU was supported by the Hong Kong Research Grants Council (PolyU 153015/14P) and PolyU (1-ZE14/1-ZE25).

PY - 2017/1/14

Y1 - 2017/1/14

N2 - 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.

AB - 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.

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

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