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Title: Magnetic x-ray microscopy at low temperatures – Visualization of flux distributions in superconductors

X-ray Magnetic Circular Dichroism (XMCD) microscopy at liquid nitrogen temperature has been performed on bilayers of high-T{sub c} superconducting YBCO (YBa{sub 2}Cu{sub 3}O{sub 7-δ}) and soft-magnetic Co{sub 40}Fe{sub 40}B{sub 20}. This should allow us to map the magnetic flux density distribution in the current-carrying state of the superconductor with high spatial resolution. For that purpose the UHV scanning X-ray microscope MAXYMUS has been upgraded by a MMR Micro Miniature Joule-Thompson cryostat capable of temperatures between 75 K and 580 K. Resulting XMCD images of the magnetic flux density in the superconductor with a field of view ranging from millimeters to micrometers are presented. The microscope’s unique combination of total electron yield (TEY) measurements together with low temperatures offers novel possibilities concerning the current transport in superconductors on small length scales.
Authors:
; ; ; ;  [1] ;  [2]
  1. Max Planck Institute for Intelligent Systems, Heisenbergstraße 3, 70569 Stuttgart (Germany)
  2. Research Institute for Innovative Surfaces, FINO, Aalen University, Beethovenstraße 1, 73430 Aalen (Germany)
Publication Date:
OSTI Identifier:
22494395
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1696; Journal Issue: 1; Conference: XRM 2014: 12. international conference on X-ray microscopy, Melbourne (Australia), 26-31 Oct 2014; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BARIUM OXIDES; COPPER OXIDES; CRYOSTATS; DISTRIBUTION; ELECTRONS; FLUX DENSITY; HIGH-TC SUPERCONDUCTORS; IMAGES; LIQUEFIED GASES; MAGNETIC CIRCULAR DICHROISM; MAGNETIC FLUX; MICROSCOPES; MICROSCOPY; NITROGEN; SPATIAL RESOLUTION; TEMPERATURE RANGE 0065-0273 K; X RADIATION; YTTRIUM OXIDES