Friday, 2C-04, 11:30-11:40

Solution Deposited Layers for Joining Coated Conductors

G. Kotzyba

A. Will¹, R. Nast¹, W. Goldacker¹, O. Stadel²

¹Forschungszentrum Karlsruhe, Institut für Technische Physik, Postfach 3640, D-76021 Karlsruhe
phone: +497247-822922, fax: +497247-825398, e-mail: gunter.kotzyba@itp.fzk.de
²PerCoTech AG, Bienroder Weg 53, D-38108 Braunschweig
phone: +49531-3919424, fax: +49531-3919424, e-mail: o.stadel@percotech.de

The two great challenges in the development of 2G YBCO high temperature superconductors are the enhancement of the critical current density on the one hand and the reduction of hysteresis losses on the other hand. Therefore the superconducting layers have to be structured to get parallel filamentary percolation paths with periodic transposition in addition. Transposition requires a multilayer system. The motivation of our work is the generation of a suitable architecture and preparation routes to satisfy this criteria by joining YBCO structured layers.

We present an economical solution derived procedure with a simple buffer layer design consisting of a 200 nm La₂Zr₂O₇ and a 50 nm CeO₂ layer dip coated on Ni-4at.% W RABiTS tape. The high quality of the crack-free layers was shown by MOCVD deposition of YBCO on top with critical current densities up to 2 MA/cm². Chemical deposition of YBCO from non-fluorine 2,4-pentanedionate precursors in pyridine, propanoic acid and methanol was successfully performed on SrTiO3 (100) single crystals with critical current densities up to 2.8 MA/cm². On buffered RABiTS tapes deposited YBCO showed inhibited transport currents from BaCO3 formation.

The results are discussed with respect to future development of a low cost deposition route in combination with structuring and joining YBCO layers to get low AC loss coated conductors.

Download Extended Abstract

Back to the Friday Schedule.