Počet záznamů: 1
Evaluation of Aberration-corrected Optical Sectioning for Exploring the Core Structure of 1/2[111] Screw Dislocations in BCC Metals
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SYSNO ASEP 0483111 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Evaluation of Aberration-corrected Optical Sectioning for Exploring the Core Structure of 1/2[111] Screw Dislocations in BCC Metals Tvůrce(i) Hernandez-Maldonado, D. (GB)
Gröger, Roman (UFM-A) RID, ORCID
Ramasse, Q. M. (GB)
Hirsch, P. B. (GB)
Nellist, P. D. (GB)Celkový počet autorů 5 Zdroj.dok. Microscopy and Microanalysis. - : Cambridge University Press - ISSN 1431-9276
Roč. 23, č. 1 (2017), s. 432-433Poč.str. 2 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova optical sectioning ; screw dislocation ; electron microscopy Vědní obor RIV BM - Fyzika pevných látek a magnetismus Obor OECD Condensed matter physics (including formerly solid state physics, supercond.) CEP GA16-13797S GA ČR - Grantová agentura ČR LQ1601 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UFM-A - RVO:68081723 DOI 10.1017/S1431927617002847 Anotace The introduction of spherical-aberration correctors in the Scanning Transmission Electron Microscope
(STEM) has allowed an improvement in spatial resolution to the sub-angström scale accompanied by a
reduction of the depth of focus (due to the increase in probe convergence angles), which in a modern
instrument is just a few nanometers, thus often less than the sample thickness. This can be exploited to
extract information along the beam direction by focusing the electron probe at specific depths within the
sample. In this communication we will evaluate the optical sectioning technique to explore the core structure of
1/2[111] screw dislocations in body-centred cubic (BCC) metals. The study of this structure is of high
interest because the low-temperature plastic deformation of BCC metals is controlled by the glide of
1/2[111] screw dislocations. The aim of this work is to investigate whether the edge and screw displacements
associated with 1/2[111] screw dislocations in BCC metals can be detected by optical sectioning in high-angle
annular dark field (HAADF) imaging in STEM conditions.Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2019
Počet záznamů: 1