Atomic structure imaging of L 10 -type FePd nanoparticles by spherical aberration corrected high-resolution transmission electron microscopy

Kazuhisa Sato, Toyohiko J. Konno, Yoshihiko Hirotsu

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The atomic structure of FePd nanoparticles has been studied by spherical aberration (Cs) corrected high-resolution transmission electron microscopy. The periodic arrangement of atoms arising from chemical order is clearly seen as bright contrast due to the small negative value of corrected Cs. The amount of optimal defocus (Scherzer defocus) is markedly reduced by the small Cs value. The interface between crystalline particles and the amorphous matrix can also be observed, free of imaging artifacts, at a small defocus value. The reconstructed phase image directly shows the projected potential distribution within the specimen and reveals the elemental differences due to chemical order. The clear-cut long-range order is lost when particle size is smaller than about 5 nm, at which locally ordered mixed-phase particles begin to dominate.

Original languageEnglish
Article number034308
JournalJournal of Applied Physics
Volume105
Issue number3
DOIs
Publication statusPublished - 2009 Feb 24

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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