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Mist over Fe-Oxypnictide Landscape. Laser Scanning Confocal Microsopy provides us with the precise geometric and measurements we require in order to accurately compare sample properties. This low angle projection and fog were generated using Scandium 5 software from 3D data generated by an Olympus OLS3100 LSCM. The Ba(Fe0.9Co0.1)2As2 (Co-doped 122 phase) was produced by Jianyi Jiang and had a Tc of 23 K
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Darkness falls on LaFeAs-OF. Fractured surface from LaFeAs-OF sample imaged using a laser scanning confocal image (LSCM). A white light (LED source) image is used to color a higher resolution scanning laser generated image. The fracture image is used to reveal the existence of multiple phases as well as the grain size. The LSCM also provides volumetric data on the sample that is used in conjunction with electrical measurements made at the Applied Superconductivity Center and NHMFL. The Polycrystalline LaFeAsO0.89F0.11 samples were made by solid state synthesis at ORNL: Sefat, A. S. et al. Electron correlations in the superconductor LaFeAsO0.89F0.11 with low carrier density. Phys. Rev. B 77 174503 (2008).
Less fanciful views of this sample can be seen on the cover of the Oct 20th 2008 edition of Chemical & Engineering News and in our Fe-As gallery.
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False
color fractograph of SMI PIT Nb3Sn A15 layer. FESEM image colored for effect (a rejected image for the annual
ASC Holiday/New Year card). Unreacted strand supplied to
the UW by Shapemetal Innovation B. V., Enschede, The Netherlands.
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False
color image of filaments in polished cross-section of Furukawa
ITER Nb3Sn strand. Note the exceptional uniformity
and the barely discernable extra spacing between the original
bundles of 19 filaments.
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Another
false color variant on the Furukawa ITER strand. The unreacted
Nb cores (green) are more visible here. FESEM image.
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False
color images of Nb3Sn filament extracted for IGC-AS
ITER strand. FESEM image. The filament as approximately
1/25 the thickness of a sheet of paper.
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13 µm diameter NbTiTa filaments etched out of IGC-AS
Nb-Ti-Ta strand for FNAL-LHC IR Quads. FESEM.
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Montage showing design of IGC-AS high J<sub>c</sub> (critical current density) internal Sn strand. Heat treated
strand supplied to the UW by IGC-Advanced Superconductors, Waterbury,
CT.
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Deep etch of IGC-AS internal Sn strand (Cu removed by etch).
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False color FESEM image of deep-etch IGC-AS Nb3Sn
strand.
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A windows background image showing Nb3Sn filaments
exposed by deep Cu etch.
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