MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Order-Disorder Transformation in L10-FePd Nanoparticles Studied by Electron Diffraction
Kazuhisa SatoYoshihiko Hirotsu
Author information
JOURNALS FREE ACCESS

2006 Volume 47 Issue 1 Pages 59-62

Details
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.

Information related to the author
© 2006 The Japan Institute of Metals and Materials
Previous article Next article
feedback
Top