Enhanced flux pinning in MOCVD-YBCO films through Zr additions: systematic feasibility studies

Systematic effects of Zr additions on the structural and flux pinning properties of YBa2Cu3O7-delta (YBCO) films deposited by metal-organic chemical vapor deposition (MOCVD) have been investigated. Detailed characterization, conducted by coordinated transport, x-ray diffraction, scanning and transmi...

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Veröffentlicht in:	Superconductor science & technology 2010-01, Vol.23 (1), p.014005-014005 (7)
Hauptverfasser:	Aytug, T, Paranthaman, M, Specht, E D, Zhang, Y, Kim, K, Zuev, Y L, Cantoni, C, Goyal, A, Christen, D K, Maroni, V A, Chen, Y, Selvamanickam, V
Format:	Artikel
Sprache:	eng
Schlagworte:	Barium zirconates CHEMICAL VAPOR DEPOSITION Condensed matter: electronic structure, electrical, magnetic, and optical properties COPPER OXIDE Correlation analysis CRITICAL CURRENT Critical currents CURRENT DENSITY Exact sciences and technology FEASIBILITY STUDIES FLUX PINNING FLUXES Imaging MAGNETIC FLUX MATERIALS SCIENCE MICROSCOPY MICROSTRUCTURES Nanostructure Physics PINNING Properties of type I and type II superconductors SCANNING ELECTRON MICROSCOPY Superconductivity SUPERCONDUCTORS TRANSMISSION ELECTRON MICROSCOPY TRANSPORT Vortex lattices ,flux pinning, flux creep X-RAY DIFFRACTION YBCO superconductors YTTRIUM OXIDE
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Zusammenfassung:	Systematic effects of Zr additions on the structural and flux pinning properties of YBa2Cu3O7-delta (YBCO) films deposited by metal-organic chemical vapor deposition (MOCVD) have been investigated. Detailed characterization, conducted by coordinated transport, x-ray diffraction, scanning and transmission electron microscopy analyses, and imaging Raman microscopy have revealed trends in the resulting property/performance correlations of these films with respect to varying mole percentages (mol%) of added Zr. For compositions < =7.5 mol%, Zr additions lead to improved in-field critical current density, as well as extra correlated pinning along the c-axis direction of the YBCO films via the formation of columnar, self-assembled stacks of BaZrO3 nanodots.
ISSN:	0953-2048 1361-6668
DOI:	10.1088/0953-2048/23/1/014005