Electron microscopy study of L10-FePtCu nanoparticles synthesized at 613K

Y. Hirotsu, H. W. Ryu, K. Sato, M. Ishimaru

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    Finely dispersed hard magnetic L1o-FePtCu nanoparticles with 〈100〉 orientation were directly synthesized by RF-sputtering on NaCl substrate at a temperature of 613 K. The maximum coercivity of the particles was 1.4 kOe (at RT). Degrees of atomic long-range order (LRO) for the L1o-FePtCu nanoparticles with different sizes were obtained using nanobeam electron diffraction technique. The decrease of LRO parameter became remarkable when the size became below 8 nm. The coercivity value also decreased with decreasing the particle size. The relation between the LRO parameter decrease and the coercivity decrease with particle size was discussed.

    Original languageEnglish
    Pages (from-to)94-99
    Number of pages6
    JournalJournal of Microscopy
    Volume236
    Issue number2
    DOIs
    Publication statusPublished - 2009 Nov

    Keywords

    • Coercivity
    • Electron diffraction
    • Electron microscopy
    • Magnetic nanoparticles
    • Order parameter

    ASJC Scopus subject areas

    • Pathology and Forensic Medicine
    • Histology

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