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Proposal for Measuring Magnetism with Patterned Apertures in a Transmission Electron Microscope
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).ORCID iD: 0000-0002-0999-3569
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2019 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 122, no 3, article id 037201Article in journal, Letter (Refereed) Published
Abstract [en]

We propose a magnetic measurement method utilizing a patterned post-sample aperture in a transmission electron microscope. While utilizing electron magnetic circular dichroism, the method circumvents previous needs to shape the electron probe to an electron vortex beam or astigmatic beam. The method can be implemented in standard scanning transmission electron microscopes by replacing the spectrometer entrance aperture with a specially shaped aperture, hereafter called ventilator aperture. The proposed setup is expected to work across the whole range of beam sizes -- from wide parallel beams down to atomic resolution magnetic spectrum imaging.

Place, publisher, year, edition, pages
2019. Vol. 122, no 3, article id 037201
Keywords [en]
EMCD, Magnetism, TEM, EELS
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Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-163810DOI: 10.1103/PhysRevLett.122.037201ISI: 000456782500011OAI: oai:DiVA.org:su-163810DiVA, id: diva2:1276971
Funder
Swedish Research Council, 2016-05113Knut and Alice Wallenberg Foundation, 3DEM-NATUR 2012.0112Göran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of TechnologyCarl Tryggers foundation Available from: 2019-01-09 Created: 2019-01-09 Last updated: 2019-03-04Bibliographically approved

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Publisher's full textarXiv:1810.05838

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Thersleff, ThomasSchönström, Linus
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