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Note: Soft X-ray transmission polarizer based on ferromagnetic thin films
KTH.
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2018 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 89, no 3, article id 036103Article in journal (Refereed) Published
Abstract [en]

A transmission polarizer for producing elliptically polarized soft X-ray radiation from linearly polarized light is presented. The setup is intended for use at synchrotron and free-electron laser beamlines that do not directly offer circularly polarized light for, e.g., X-ray magnetic circular dichroism (XMCD) measurements or holographic imaging. Here, we investigate the degree of ellipticity upon transmission of linearly polarized radiation through a cobalt thin film. The experiment was performed at a photon energy resonant to the Co L3-edge, i.e., 778 eV, and the polarization of the transmitted radiation was determined using a polarization analyzer that measures the directional dependence of photo electrons emitted from a gas target. Elliptically polarized radiation can be created at any absorption edge showing the XMCD effect by using the respective magnetic element. 

Place, publisher, year, edition, pages
American Institute of Physics Inc. , 2018. Vol. 89, no 3, article id 036103
Keywords [en]
Dichroism, Electrons, Ferromagnetic materials, Free electron lasers, Light polarization, Optical instruments, Polarization, Thin films, Circularly polarized light, Directional dependence, Ferromagnetic thin films, Linearly polarized light, Linearly-polarized radiations, Polarization analyzers, Transmission polarizers, X-ray magnetic circular dichroism, X rays
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-227419DOI: 10.1063/1.5018396ISI: 000428988300073Scopus ID: 2-s2.0-85043352072OAI: oai:DiVA.org:kth-227419DiVA, id: diva2:1210651
Note

Export Date: 9 May 2018; Article; CODEN: RSINA; Correspondence Address: Müller, L.; Deutsches Elektronen-Synchrotron DESY, FS-CXSGermany; email: Leonard.Mueller@desy.de; Funding details: SFB 925, DFG, California Department of Fish and Game; Funding details: A3, DFG, California Department of Fish and Game; Funding details: B3, DFG, California Department of Fish and Game; Funding details: B2, DFG, California Department of Fish and Game; Funding details: Knut och Alice Wallenbergs Stiftelse; Funding text: Financial support by DFG within SFB 925, projects B3, A3, and B2 is gratefully acknowledged. M.H.B. acknowledges support from the Knut and Alice Wallenberg foundation. QC 20180529

Available from: 2018-05-29 Created: 2018-05-29 Last updated: 2018-05-29Bibliographically approved

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