Order-disorder transformation in L10-FePd nanoparticles studied by electron diffraction

Kazuhisa Sato, Yoshihiko Hirotsu

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    Disappearance of long-range atomic order in 10-nm-sized L10-FePd (Fe-58 at%Pd) nanoparticles has been studied by electron diffraction using a specimen heating stage attached to a transmission electron microscope. Ordered structure is kept at lowest up to 949 K, while the intensity of superlattice reflection abruptly drops at 982 K. The transformation temperature decreases by about 80 K compared to that of the bulk alloy of Fe-58 at%Pd. Nanobeam electron diffraction from a particle shows a particle size dependence of the transformation temperature and the intensity of 110 superlattice reflection largely decreases below about 15 nm in diameter at 983 K. However, a weak intensity remains in the 110 superlattice reflection even at 983 K, which is attributed to short-range order in the nanoparticles.

    Original languageEnglish
    Pages (from-to)59-62
    Number of pages4
    JournalMaterials Transactions
    Volume47
    Issue number1
    DOIs
    Publication statusPublished - 2006 Jan 1

    Keywords

    • Electron diffraction
    • FePd
    • L1
    • Long-range order
    • Nanoparticle
    • Order-disorder transformation
    • Short-range order

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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