CoNiP electroless deposition process for fabricating ferromagnetic nanodot arrays

Takanari Ouchi, Naofumi Shimano, Takayuki Homma

    研究成果: Article

    10 引用 (Scopus)

    抄録

    An electroless deposition process for fabricating CoNiP nanodot arrays (less than 50 nm in height) with high magnetic coercivities was investigated. To fabricate such nanostructures, we improved the crystallinity of the CoNiP deposits in the initial deposition stage by applying an fcc-Cu(1 1 1) underlayer with low lattice mismatch to hcp-Co(0 0 0 2), and an autocatalytic electroless deposition process at the Cu surface was carried out by using dual reducing agents, H2PO2 - and N2H4. CoNiP films demonstrated high perpendicular magnetic coercivities in the initial deposition stage since the highly crystalline hcp(0 0 0 2) CoNiP layers were grown parallel to the Cu underlayers. Nanopatterned substrates were formed by UV-nanoimprint lithography. CoNiP was electroless deposited on the nanopatterned substrates. As a result, CoNiP was deposited selectively from the bottom of the nanopores with few defects in a large area. Perpendicular coercivities higher than 3000 Oe were obtained for nanodots even with heights of 50 nm. Thus, an electroless deposition process that can be used to form nanostructures with high crystallinities in the initial stage without any anomalous deposition was demonstrated.

    元の言語English
    ページ(範囲)9575-9580
    ページ数6
    ジャーナルElectrochimica Acta
    56
    発行部数26
    DOI
    出版物ステータスPublished - 2011 11 1

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    Electroless plating
    Coercive force
    Nanostructures
    Nanoimprint lithography
    Lattice mismatch
    Nanopores
    Reducing Agents
    Reducing agents
    Substrates
    Deposits
    Crystalline materials
    Defects

    ASJC Scopus subject areas

    • Electrochemistry
    • Chemical Engineering(all)

    これを引用

    CoNiP electroless deposition process for fabricating ferromagnetic nanodot arrays. / Ouchi, Takanari; Shimano, Naofumi; Homma, Takayuki.

    :: Electrochimica Acta, 巻 56, 番号 26, 01.11.2011, p. 9575-9580.

    研究成果: Article

    Ouchi, Takanari ; Shimano, Naofumi ; Homma, Takayuki. / CoNiP electroless deposition process for fabricating ferromagnetic nanodot arrays. :: Electrochimica Acta. 2011 ; 巻 56, 番号 26. pp. 9575-9580.
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    abstract = "An electroless deposition process for fabricating CoNiP nanodot arrays (less than 50 nm in height) with high magnetic coercivities was investigated. To fabricate such nanostructures, we improved the crystallinity of the CoNiP deposits in the initial deposition stage by applying an fcc-Cu(1 1 1) underlayer with low lattice mismatch to hcp-Co(0 0 0 2), and an autocatalytic electroless deposition process at the Cu surface was carried out by using dual reducing agents, H2PO2 - and N2H4. CoNiP films demonstrated high perpendicular magnetic coercivities in the initial deposition stage since the highly crystalline hcp(0 0 0 2) CoNiP layers were grown parallel to the Cu underlayers. Nanopatterned substrates were formed by UV-nanoimprint lithography. CoNiP was electroless deposited on the nanopatterned substrates. As a result, CoNiP was deposited selectively from the bottom of the nanopores with few defects in a large area. Perpendicular coercivities higher than 3000 Oe were obtained for nanodots even with heights of 50 nm. Thus, an electroless deposition process that can be used to form nanostructures with high crystallinities in the initial stage without any anomalous deposition was demonstrated.",
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