TY - JOUR
T1 - HRTEM image contrast of short range order in Ni4Mo
AU - Hata, S.
AU - Shindo, D.
AU - Mitate, T.
AU - Kuwano, N.
AU - Matsumura, S.
AU - Oki, K.
N1 - Funding Information:
This study was partly supported by Grants-in-Aid for Scientific Research (b) (2) (#10450234) and (1) (#09242102, #09242106) from the Ministry of Education, Science, Sports and Culture, Japan. One of the authors (S.H.) is indebted for financial support to the Kazato Research Foundation, Japan.
Copyright:
Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 2000/10
Y1 - 2000/10
N2 - The high resolution transmission electron microscope (HRTEM) imaging of short range order (SRO) in Ni4Mo was investigated by means of multi-slice image simulations. The HRTEM images of Ni4Mo exhibit locally bright dot patterns corresponding to the [001] projections of the N2M2-type (chalcopyrite-like) structure. The multi-slice simulations revealed that the N2M2 patterns are rationalized as the projection patterns of the SRO structure which consists of subunit cell clusters of D1(a), D022 and Pt2Mo structures. The N2M2-type image contrast appears when both the fundamental fcc lattice reflections and the 1 1/2 0 diffuse scattering of SRO contribute enough to imaging. This suggests that a good coincidence in intensity distribution between the Fourier power spectra of HRTEM images and the electron diffraction patterns is one of the conditions for the image contrast of SRO to be interpreted in terms of the projection contrast. (C) 2000 Elsevier Science Ltd.
AB - The high resolution transmission electron microscope (HRTEM) imaging of short range order (SRO) in Ni4Mo was investigated by means of multi-slice image simulations. The HRTEM images of Ni4Mo exhibit locally bright dot patterns corresponding to the [001] projections of the N2M2-type (chalcopyrite-like) structure. The multi-slice simulations revealed that the N2M2 patterns are rationalized as the projection patterns of the SRO structure which consists of subunit cell clusters of D1(a), D022 and Pt2Mo structures. The N2M2-type image contrast appears when both the fundamental fcc lattice reflections and the 1 1/2 0 diffuse scattering of SRO contribute enough to imaging. This suggests that a good coincidence in intensity distribution between the Fourier power spectra of HRTEM images and the electron diffraction patterns is one of the conditions for the image contrast of SRO to be interpreted in terms of the projection contrast. (C) 2000 Elsevier Science Ltd.
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U2 - 10.1016/S0968-4328(99)00134-1
DO - 10.1016/S0968-4328(99)00134-1
M3 - Article
AN - SCOPUS:0034064522
VL - 31
SP - 533
EP - 538
JO - Micron and Microscopica Acta
JF - Micron and Microscopica Acta
SN - 0968-4328
IS - 5
ER -