Wm. Vetter et M. Dudley, Partial dislocations in the X-ray topography of as-grown hexagonal siliconcarbide crystals, MAT SCI E B, 87(2), 2001, pp. 173-177
Dislocations visible in X-ray topographs of as-grown hexagonal silicon carb
ide Lely platelets and physical vapor transport process wafers extinguished
as if they had Burgers vectors of 1/3<11 (2)over bar0 >. Under the electro
n microscope, beneath the resolution of X-ray topography, short lengths of
these dislocations were shown to consist of pairs of 1/3 < 10 (1) over bar0
> Shockley partials spanning narrow ribbons of stacking fault. An unusual
example of a b = 1/3 < 11 (2) over bar0 > dislocation in a Lely platelet vi
sibly separated into its partials in an X-ray topograph was presented. (C)
2001 Elsevier Science B.V. All rights reserved.