https://doi.org/10.1051/epjap:1998135
Preparation and characterization of melt textured NdBa2Cu3O7−δ bulk superconducting ceramics
1
Laboratoire CRISMAT, ISMRA, UMR 6508
2
Laboratoire LERMAT, UPRESSA 6004,
6 boulevard du Maréchal Juin, 14050 Caen Cedex, France
3
EMAT-RUCA, University of Antwerp, 171 Groenenborgerlaan,
2020 Antwerp, Belgium
4
Laboratoire de physique de l'état condensé,
Université du Maine, route de
Laval, 72017 Le Mans, France
Corresponding author: i.monot@crismat.ismra.fr
Received:
13
June
1997
Revised:
29
September
1997
Accepted:
13
November
1997
Published online: 15 February 1998
NdBaCuO superconductors have been textured by the oxygen controlled melt growth method. The addition of platinum or Nd422 does not refine the 422 phase, but the latter improves the microstructural quality. High purity precursors are necessary to achieve high Tc and Jc (up to 56 000 A/cm2). The flux pinning mechanisms are discussed in terms of oxygen deficiency, Nd-Ba substitution and softening of the vortex lattice.
PACS: 81.30.-t – Phase diagrams and microstructures developed by solidification and solid-solid phase transformation / 74.60.Jg – Critical currents
© EDP Sciences, 1998
