MOD derived pyrochlore films as buffer layer for all-chemical YBCO coated conductors

Andrea Augieri, Angelo Vannozzi, Rita Mancini, Achille Armenio Angrisani, Fabio Fabbri, Valentina Galluzzi, Alessandro Rufoloni, Francesco Rizzo, Antonella Mancini, Giuseppe Celentano, Ivan Colantoni, Ivan Davoli, Nicola Pompeo, Giovanni Sotgiu, Enrico Silva

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Abstract

We report a detailed study performed on La2Zr2O7pyrochlore material grown by the metal-organic decomposition method as buffer layers for YBa2Cu3O7-x (YBCO) coated conductors. High-quality epitaxial LZO thin films have been obtained on single crystal (SC) and Ni-5% at.W substrates. In order to evaluate structural and morphological properties, films have been characterized by means of X-ray diffraction analyses, atomic force microscopy, and scanning electron microscopy. Precursor solutions and heat treatments have been studied by thermogravimetric analyses and infrared spectra with the aim of optimizing the annealing process. Thin films of YBCO have been deposited by pulsed laser ablation on this buffer layer. The best results obtained on SC showed YBCO films with critical temperature values above 90 K, high self-field critical current density values Jc> 1MA/cm2), and high irreversibility field values (8.3 T) at 77 K together with a rather high depinning frequency νp(0.5T, 77K) > 44GHz as determined at microwaves. The best results on Ni-5% at.W has been obtained introducing in the heat treatment a pyrolysis process at low temperature in air in order to remove the residual organic part of the precursor solution. © 2012 IEEE.
Original languageEnglish
Article number6600505
Pages (from-to)-
JournalIEEE Transactions on Applied Superconductivity
Volume23
Issue number3
DOIs
Publication statusPublished - 2013
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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