Direct synthesis of isolated L10-FePtCu nanoparticles by RF-magnetron sputtering

Han Wool Ryu, Kazuhisa Sato, Yoshihiko Hirotsu

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    Isolated and oriented hard magnetic FePtCu ternary alloy nanoparticles with the L10-type ordered structure have been directly fabricated by rf-magnetron sputtering onto NaCl substrate kept at 613K without any post-deposition annealing. Structure and morphology of those particles were studied by TEM. When the sputtering duration decreases, the particle size decreases and the particle areal number density increases. These nanoparticles have 〈100〉 orientation on the NaCl substrate. Alloy composition distribution from particle to particle examined by nano-beam elemental x-ray analysis was found to be quite small, which can be attributed to the homogeneous structure formed by co-deposition of Fe, Pt and Cu by sputtering. Thermal fluctuation of the magnetization becomes prominent in the specimen with the particle size smaller than about 10nm in diameter.

    Original languageEnglish
    Title of host publicationDesigning of Interfacial Structures in Advanced Materials and their Joints - Proceedings of the Int. Workshop on Designing of Interfacial Structures in Advanced Materials and their Joints, DIS'06
    PublisherTrans Tech Publications Ltd
    Pages129-134
    Number of pages6
    ISBN (Print)9783908451334
    DOIs
    Publication statusPublished - 2007 Jan 1
    EventInternational Workshop on Designing of Interfacial Structures in Advanced Materials and their Joints, DIS'06 - Osaka, Japan
    Duration: 2006 May 182006 May 20

    Publication series

    NameSolid State Phenomena
    Volume127
    ISSN (Print)1012-0394

    Other

    OtherInternational Workshop on Designing of Interfacial Structures in Advanced Materials and their Joints, DIS'06
    CountryJapan
    CityOsaka
    Period06/5/1806/5/20

    Keywords

    • FePtCu
    • Low temperature ordering
    • Sputtering
    • TEM

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics
    • Materials Science(all)
    • Condensed Matter Physics

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