Abstract
Experimental conditions needed to obtain atomic-resolution images of dislocation cores are discussed. Experimental and computer-simulated images are used to show that, to a limited but useful resolution, these images are periodic functions of the specimen thickness as a consequence of dynamical scattering. Useful images may therefore be obtained from some specimens of sufficient thickness to allow surface relaxation effects to be neglected. End-on projections of stair-rod dislocations and dislocation dipoles are suggested for further study.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 463-482 |
| Number of pages | 20 |
| Journal | Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties |
| Volume | 38 |
| Issue number | 4 |
| State | Published - Oct 1978 |
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ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Metals and Alloys
- Physics and Astronomy (miscellaneous)
- Condensed Matter Physics
Cite this
ON THE THICKNESS PERIODICITY OF ATOMIC-RESOLUTION IMAGES OF DISLOCATION CORES. / Spence, John; O'Keefe, M. A.; Iijima, S.
In: Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties, Vol. 38, No. 4, 10.1978, p. 463-482.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - ON THE THICKNESS PERIODICITY OF ATOMIC-RESOLUTION IMAGES OF DISLOCATION CORES.
AU - Spence, John
AU - O'Keefe, M. A.
AU - Iijima, S.
PY - 1978/10
Y1 - 1978/10
N2 - Experimental conditions needed to obtain atomic-resolution images of dislocation cores are discussed. Experimental and computer-simulated images are used to show that, to a limited but useful resolution, these images are periodic functions of the specimen thickness as a consequence of dynamical scattering. Useful images may therefore be obtained from some specimens of sufficient thickness to allow surface relaxation effects to be neglected. End-on projections of stair-rod dislocations and dislocation dipoles are suggested for further study.
AB - Experimental conditions needed to obtain atomic-resolution images of dislocation cores are discussed. Experimental and computer-simulated images are used to show that, to a limited but useful resolution, these images are periodic functions of the specimen thickness as a consequence of dynamical scattering. Useful images may therefore be obtained from some specimens of sufficient thickness to allow surface relaxation effects to be neglected. End-on projections of stair-rod dislocations and dislocation dipoles are suggested for further study.
UR - http://www.scopus.com/inward/record.url?scp=0018021460&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0018021460&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0018021460
VL - 38
SP - 463
EP - 482
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
SN - 0141-8610
IS - 4
ER -