Issue |
Eur. Phys. J. AP
Volume 2, Number 2, May 1998
|
|
---|---|---|
Page(s) | 157 - 161 | |
DOI | https://doi.org/10.1051/epjap:1998179 | |
Published online | 15 May 1998 |
https://doi.org/10.1051/epjap:1998179
Observation of the elastic field related to a structural domain boundary along a {111}NiSi2//{115}Si heterotwin interface*
1
Institut National Polytechnique de
Grenoble (LTPCM (UMR 5614)),
ENSEEG, BP. 75, 38402, Saint-Martin-d'Hères, France
2
HRTEM Lab., Materials Science Centre,
National Tsing-Hua University, Hsinchu, Taiwan,
Republic of China
Corresponding author: rbonnet@ltpcm.inpg.fr
Received:
28
October
1997
Revised:
26
December
1997
Accepted:
20
February
1998
Published online: 15 May 1998
A
heterotwin interface has been observed by high resolution
electron microscopy (HREM) along the common
direction
to identify the long
period atomic structural units (ASU's). Coexistence of two different structural doMayns has been
found with ASU's corresponding to two different cycles of five-, six-, and
seven-atom rings. A
dislocation/ledge (DL) has been particularly studied because its separates these two unusual cycles of
ASU's. The elastic displacement field u
of the atom columns around the DL has been calculated using
both crystallographic and anisotropic elasticity
properties of the crystals, assuming a two-dimensional
u field. From a comparison between the positions of the atom columns as
derived from elasticity
calculations and as deduced from the HREM image, it is concluded that the DL is a mixed dislocation
with the Burgers vector
,
a result also in
agreement with the imperceptible ledge height associated with the DL core. Such a Burgers vector
underlines the role of the Si matrix dislocations for producing such structural doMayns.
PACS: 68.35.Bs – Surface structure and topography
© EDP Sciences, 1998
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