TY - JOUR
T1 - Forbidden-reflection lattice imaging for the determination of kink densities on partial dislocations
AU - Alexander, H.
AU - Spence, John
AU - Shindo, D.
AU - Gottschalk, H.
AU - Long, N.
N1 - Funding Information:
The authors wish to thank E. Heister and C. Kisielowski-Kemmerich for their assistance with crystal deformation. The Deutsche Forschung-gemeinschaft provided financial support for one of the authors (H.A.) to visit ASU. This work was supported by NSF grant DMR 8002108 (J.C.H.S., P.I.) and the facilities of the NSF National Center for HREM at ASU. We are also particularly grateful to J. Wheatley for his help.
PY - 1986/5
Y1 - 1986/5
N2 - High-resolution electron microscope lattice images have been obtained at the Schemer focus setting for the first time from the ′forbidden′ {422}/3 Bragg reflections which result from intrinsic stacking faults (lying normal to the beam) in thin crystals of silicon. Microdiffraction patterns have also been obtained from stacking faults normal to the beam, showing these reflections. The boundaries of the SF lattice image delineate the approximate location of partial dislocation cores running normal to the beam, and these reveal a high density of directional fluctuations, despite their appearance as straight dislocations in the corresponding weak-beam images, The effects of surface roughness on an atomic scale are discussed, and this is shown to limit the accuracy with which the partial dislocation cores can be located to within a few ángstroms.
AB - High-resolution electron microscope lattice images have been obtained at the Schemer focus setting for the first time from the ′forbidden′ {422}/3 Bragg reflections which result from intrinsic stacking faults (lying normal to the beam) in thin crystals of silicon. Microdiffraction patterns have also been obtained from stacking faults normal to the beam, showing these reflections. The boundaries of the SF lattice image delineate the approximate location of partial dislocation cores running normal to the beam, and these reveal a high density of directional fluctuations, despite their appearance as straight dislocations in the corresponding weak-beam images, The effects of surface roughness on an atomic scale are discussed, and this is shown to limit the accuracy with which the partial dislocation cores can be located to within a few ángstroms.
UR - http://www.scopus.com/inward/record.url?scp=0022720534&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0022720534&partnerID=8YFLogxK
U2 - 10.1080/01418618608242861
DO - 10.1080/01418618608242861
M3 - Article
AN - SCOPUS:0022720534
SN - 0141-8610
VL - 53
SP - 627
EP - 643
JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
IS - 5
ER -