Top seeding melt texture growth of NdBaCuO pellets in air

The European Physical Journal Applied Physics

The European Physical Journal Applied Physics / Volume 13 / Issue 03 / March 2001, pp 157-160
© EDP Sciences, 2001
Published online by Cambridge University Press: 21 February 2011
DOI: http://dx.doi.org/10.1051/epjap:2001128 (About DOI)

Table of Contents - March 2001 - Volume 13, Issue 03

Semiconductors and Devices

Top seeding melt texture growth of NdBaCuO pellets in air *

Article author query
guilmeau e [PubMed] [Google Scholar]
giovannelli f [PubMed] [Google Scholar]
monot-laffez i [PubMed] [Google Scholar]
marinel s [PubMed] [Google Scholar]
provost j [PubMed] [Google Scholar]
desgardin g [PubMed] [Google Scholar]

E. Guilmeau^a1, F. Giovannelli^a1, I. Monot-Laffez^a1, S. Marinel^a1, J. Provost^a1 and G. Desgardin^a1

CRISMAT Laboratory (UMR 6508 CNRS/ISMRA), 6 boulevard du Maréchal Juin, 14050 Caen, France

Abstract

Most of NdBaCuO synthesis were realized under oxygen controlled melt growth (OCMG) which allows to avoid the solid solution formation. However, for industrial applications air synthesis is preferable due to its simplicity and its cost. In this work, different seeds and thermal cycles have been investigated in order to optimize the nucleation conditions for the obtention of a single domain. Several criteria have been defined for the choice of the seed. The solid solution Nd_1+xBa_2−xCu₃O_y formed in these air synthesised samples appears in the range of x = 0.10 to 0.15, corresponding to $T_{\rm c_{onset}}$ between 60 K and 80 K. The nominal composition and the synthesis conditions (substrate, thermal treatments.) have to be accurately defined in order to avoid neodymium-rich solid solution formation.