Investigation of the local superconducting properties at grain boundaries in high-Tc superconductors

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Developing an atomic scale study of the structure-property relationships of grain boundaries in high-{Tc} superconductors is essential to understand their current dissipation mechanism and for incorporating these materials into viable devices. Thin YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films have been deposited by pulsed laser deposition (PLD) on SrTiO{sub 3} symmetric bicrystals. Transport measurements in a magnetic field have been conducted across the grain boundaries through a wide bridge. The data obtained are consistent with microstructural observation in a VG Microscopes HB603 U and a VG HB501 UX dedicated STEM. Of particular interest in the study of high-{Tc} materials is the use ... continued below

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5 p.

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Prouteau, C.; Duscher, G.; Browning, N.D.; Pennycook, S.J.; Verebelyi, D.; Christen, D.K. et al. February 1, 1998.

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Description

Developing an atomic scale study of the structure-property relationships of grain boundaries in high-{Tc} superconductors is essential to understand their current dissipation mechanism and for incorporating these materials into viable devices. Thin YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} films have been deposited by pulsed laser deposition (PLD) on SrTiO{sub 3} symmetric bicrystals. Transport measurements in a magnetic field have been conducted across the grain boundaries through a wide bridge. The data obtained are consistent with microstructural observation in a VG Microscopes HB603 U and a VG HB501 UX dedicated STEM. Of particular interest in the study of high-{Tc} materials is the use of EELS, which can highlight the presence of non-superconducting regions through interpretation of the onset positions and fine-structure (ELNES) of characteristic core-edge features. This preliminary investigation has shown that the study of the grain boundary electronic microstructure in parallel with transport properties study should lead to a better understanding of the transport properties of the superconducting materials. In particular, it has been shown that transport measurements are consistent with a model where the grain boundaries are composed of weak links separated by a very small fraction of much strong links although more boundaries need to be studied to draw definitive conclusions and determine the real nature of these strong links.

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5 p.

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INIS; OSTI as DE98004939

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  • Microscopy and microanalysis 1998, Atlanta, GA (United States), 12-16 Jul 1998

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  • Other: DE98004939
  • Report No.: ORNL/CP--96835
  • Report No.: CONF-980713--
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/650390 | External Link
  • Office of Scientific & Technical Information Report Number: 650390
  • Archival Resource Key: ark:/67531/metadc702275

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  • February 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Jan. 19, 2016, 7:03 p.m.

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Prouteau, C.; Duscher, G.; Browning, N.D.; Pennycook, S.J.; Verebelyi, D.; Christen, D.K. et al. Investigation of the local superconducting properties at grain boundaries in high-Tc superconductors, report, February 1, 1998; Tennessee. (digital.library.unt.edu/ark:/67531/metadc702275/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.