Long-range order parameter of single L 1 0-FePd nanoparticle determined by nanobeam electron diffraction: Particle size dependence of the order parameter

Kazuhisa Sato, Yoshihiko Hirotsu, Hirotaro Mori, Zhouguang Wang, Tsukasa Hirayama

    Research output: Contribution to journalArticlepeer-review

    38 Citations (Scopus)

    Abstract

    The long-range order (LRO) parameter (S) of single isolated L 10 -FePd nanoparticle was determined by quantitative analysis of nanobeam electron diffraction (NBD) intensities and intensity calculations considering the multiple scattering of electrons. The obtained order parameters of the nanoparticles larger than 8 nm are distributed around the mean LRO parameter (S- =0.79) which was determined by selected area electron diffraction intensity analysis, while the parameters slightly decreased gradually as the particle size decreased below about 8 nm (S=0.60-0.73). The low degree of order in very small particles is responsible for the coercivity decrease of the L 10 nanoparticles in smaller-sized regions. Quantitative NBD intensity analysis is quite useful for the determination of the LRO parameter of individual L 10 -FePd single crystalline nanoparticle. Experimental conditions required for NBD analysis are presented in detail and the possible experimental errors of the determined LRO parameters are discussed.

    Original languageEnglish
    Article number024308
    JournalJournal of Applied Physics
    Volume98
    Issue number2
    DOIs
    Publication statusPublished - 2005 Jul 15

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Fingerprint Dive into the research topics of 'Long-range order parameter of single L 1 <sub>0</sub>-FePd nanoparticle determined by nanobeam electron diffraction: Particle size dependence of the order parameter'. Together they form a unique fingerprint.

    Cite this