Atom size electron vortex beams with selectable orbital angular momentum

Abstract The decreasing size of modern functional magnetic materials and devices cause a steadily increasing demand for high resolution quantitative magnetic characterization. Transmission electron microscopy (TEM) based measurements of the electron energy-loss magnetic chiral dichroism (EMCD) may s...

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Autores principales:	Darius Pohl, Sebastian Schneider, Paul Zeiger, Ján Rusz, Peter Tiemeijer, Sorin Lazar, Kornelius Nielsch, Bernd Rellinghaus
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1b3662dc0a45487d917de928e9e61ea6
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spelling	oai:doaj.org-article:1b3662dc0a45487d917de928e9e61ea62021-12-02T15:05:07ZAtom size electron vortex beams with selectable orbital angular momentum10.1038/s41598-017-01077-92045-2322https://doaj.org/article/1b3662dc0a45487d917de928e9e61ea62017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01077-9https://doaj.org/toc/2045-2322Abstract The decreasing size of modern functional magnetic materials and devices cause a steadily increasing demand for high resolution quantitative magnetic characterization. Transmission electron microscopy (TEM) based measurements of the electron energy-loss magnetic chiral dichroism (EMCD) may serve as the needed experimental tool. To this end, we present a reliable and robust electron-optical setup that generates and controls user-selectable single state electron vortex beams with defined orbital angular momenta. Our set-up is based on a standard high-resolution scanning TEM with probe aberration corrector, to which we added a vortex generating fork aperture and a miniaturized aperture for vortex selection. We demonstrate that atom size probes can be formed from these electron vortices and that they can be used for atomic resolution structural and spectroscopic imaging – both of which are prerequisites for future atomic EMCD investigations.Darius PohlSebastian SchneiderPaul ZeigerJán RuszPeter TiemeijerSorin LazarKornelius NielschBernd RellinghausNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Darius Pohl Sebastian Schneider Paul Zeiger Ján Rusz Peter Tiemeijer Sorin Lazar Kornelius Nielsch Bernd Rellinghaus Atom size electron vortex beams with selectable orbital angular momentum
description	Abstract The decreasing size of modern functional magnetic materials and devices cause a steadily increasing demand for high resolution quantitative magnetic characterization. Transmission electron microscopy (TEM) based measurements of the electron energy-loss magnetic chiral dichroism (EMCD) may serve as the needed experimental tool. To this end, we present a reliable and robust electron-optical setup that generates and controls user-selectable single state electron vortex beams with defined orbital angular momenta. Our set-up is based on a standard high-resolution scanning TEM with probe aberration corrector, to which we added a vortex generating fork aperture and a miniaturized aperture for vortex selection. We demonstrate that atom size probes can be formed from these electron vortices and that they can be used for atomic resolution structural and spectroscopic imaging – both of which are prerequisites for future atomic EMCD investigations.
format	article
author	Darius Pohl Sebastian Schneider Paul Zeiger Ján Rusz Peter Tiemeijer Sorin Lazar Kornelius Nielsch Bernd Rellinghaus
author_facet	Darius Pohl Sebastian Schneider Paul Zeiger Ján Rusz Peter Tiemeijer Sorin Lazar Kornelius Nielsch Bernd Rellinghaus
author_sort	Darius Pohl
title	Atom size electron vortex beams with selectable orbital angular momentum
title_short	Atom size electron vortex beams with selectable orbital angular momentum
title_full	Atom size electron vortex beams with selectable orbital angular momentum
title_fullStr	Atom size electron vortex beams with selectable orbital angular momentum
title_full_unstemmed	Atom size electron vortex beams with selectable orbital angular momentum
title_sort	atom size electron vortex beams with selectable orbital angular momentum
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/1b3662dc0a45487d917de928e9e61ea6
work_keys_str_mv	AT dariuspohl atomsizeelectronvortexbeamswithselectableorbitalangularmomentum AT sebastianschneider atomsizeelectronvortexbeamswithselectableorbitalangularmomentum AT paulzeiger atomsizeelectronvortexbeamswithselectableorbitalangularmomentum AT janrusz atomsizeelectronvortexbeamswithselectableorbitalangularmomentum AT petertiemeijer atomsizeelectronvortexbeamswithselectableorbitalangularmomentum AT sorinlazar atomsizeelectronvortexbeamswithselectableorbitalangularmomentum AT korneliusnielsch atomsizeelectronvortexbeamswithselectableorbitalangularmomentum AT berndrellinghaus atomsizeelectronvortexbeamswithselectableorbitalangularmomentum
_version_	1718388940541526016

Atom size electron vortex beams with selectable orbital angular momentum

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