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  Direct observation of nanometer-scale pinning sites in (Nd0.33Eu0.20Gd0.47)Ba2Cu3O7-δ single crystals

Das, P., Koblischka, M. R., Turner, S., Van Tendeloo, G., Wolf, T., Jirsa, M., et al. (2008). Direct observation of nanometer-scale pinning sites in (Nd0.33Eu0.20Gd0.47)Ba2Cu3O7-δ single crystals. Europhysics Letters, 83: 37005, pp. 37005-p1-37005-p4. doi:10.1209/0295-5075/83/37005.

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 Creators:
Das, P.1, Author              
Koblischka, M. R., Author
Turner, S., Author
Van Tendeloo, G., Author
Wolf, T., Author
Jirsa, M., Author
Hartmann, U., Author
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1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              

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 Abstract: We report on the observation of self-organized stripe-like structures on the as-grown surface and in the bulk of (Nd, Eu, Gd) Ba2Cu3Oy single crystals. The periodicity of the stripes on the surface lies between 500-800 nm. These are possibly the growth steps of the crystal. Transmission electron microscopy investigations revealed stripes of periodicity in the range of 20-40nm in the bulk. From electron back scattered diffraction investigations, no crystallographic misorientation due to the nanostripes has been found. Scanning tunneling spectroscopic experiments revealed nonsuperconducting regions, running along twin directions, which presumably constitute strong pinning sites. Copyright (C) EPLA, 2008.

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Language(s): eng - English
 Dates: 2008
 Publication Status: Published in print
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 Rev. Type: Peer
 Identifiers: eDoc: 378234
ISI: 000259022600032
DOI: 10.1209/0295-5075/83/37005
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Title: Europhysics Letters
Source Genre: Journal
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Pages: - Volume / Issue: 83 Sequence Number: 37005 Start / End Page: 37005-p1 - 37005-p4 Identifier: ISSN: 0295-5075