Phase-Separated, Epitaxial, Nanostructured LaMnO3+MgO Composite Cap Layer Films for Propagation of Pinning Defects in YBa2Cu3O7-x Coated Conductors

Nanostructural modulation in the cap layer used in coated conductors can be a potential source for nucleating microstructural defects into the superconducting layer for improving the flux-pinning. We report on the successful fabrication of phase separated, epitaxial, nanostructured films comprised o...

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Bibliographic Details
Published in:Applied physics express 2009-01, Vol.2 (6)
Main Authors: Wee, Sung Hun, Shin, Junsoo, Cantoni, Claudia, Meyer III, Harry M, Cook, Sylvester W, Zuev, Yuri L, Specht, Eliot D, Xiong, Xuming, Paranthaman, Mariappan Parans, Selvamanickam, V., Goyal, Amit
Format: Article
Language:English
Subjects:
BARIUM OXIDES
BUFFERS
COMPOSITE MATERIALS
COPPER OXIDES
CRITICAL CURRENT
CURRENT DENSITY
DEFECTS
FABRICATION
LANTHANUM OXIDES
MAGNESIUM OXIDES
MAGNETIC FLUX
MANGANESE OXIDES
MATERIALS SCIENCE
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
SUPERCONDUCTORS
YTTRIUM OXIDES
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Summary:Nanostructural modulation in the cap layer used in coated conductors can be a potential source for nucleating microstructural defects into the superconducting layer for improving the flux-pinning. We report on the successful fabrication of phase separated, epitaxial, nanostructured films comprised of LaMnO{sub 3} (LMO) and MgO via pulsed laser deposition (PLD) on biaxially-textured MgO metallic templates with a LMO buffer layer. Scanning Auger compositional mapping and transmission electron microscopy cross sectional images confirm the nanoscale, spatial modulation corresponding to the nanostructured phase separation in the film. YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} films (0.8 {micro}m thick) grown using PLD on such phase separated, nanostructured cap layers show reduced field dependence of the critical current density with an ? value of -0.38 (in J{sub c}-H{sup -{alpha}}).
ISSN:1882-0778
1882-0786
DOI:10.1143/APEX.2.063008