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Simple method for optimization of classical electron magnetic circular dichroism measurements: The role of structure factor and extinction distances
IFW Dresden, Inst Metall Mat, Helmholtzstr 20, D-01069 Dresden, Germany;Tech Univ Dresden, Inst Festkorper & Mat Phys, D-01062 Dresden, Germany.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Materialteori.
Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA.
Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA.
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2018 (engelsk)Inngår i: PHYSICAL REVIEW MATERIALS, ISSN 2475-9953, Vol. 2, nr 11, artikkel-id 113801Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Electron magnetic circular dichroism (EMCD), the electron wave analog of x-ray magnetic circular dichroism (XMCD), allows for the element specific measurement of the spin and orbital magnetic moments with up to nanometer resolution. However, due to dynamical diffraction effects, the signal-to-noise ratios of EMCD spectra are often very low. We describe a simple set of rules, how to set up a geometry for a classical EMCD experiment on an arbitrary crystal structure to get a maximum dichroic signal. The procedure is based on an evaluation of the structure factor and extinction distances. Proof-of-concept simulations and experiments on a FeGe crystal present a successful test of these guidelines.

sted, utgiver, år, opplag, sider
AMER PHYSICAL SOC , 2018. Vol. 2, nr 11, artikkel-id 113801
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Identifikatorer
URN: urn:nbn:se:uu:diva-371497DOI: 10.1103/PhysRevMaterials.2.113801ISI: 000450572400001OAI: oai:DiVA.org:uu-371497DiVA, id: diva2:1275683
Forskningsfinansiär
Swedish Research CouncilCarl Tryggers foundation Göran Gustafsson Foundation for Research in Natural Sciences and MedicineTilgjengelig fra: 2019-01-07 Laget: 2019-01-07 Sist oppdatert: 2019-01-07bibliografisk kontrollert

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