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Top seeding melt texture growth of NdBaCuO pellets in air*

Published online by Cambridge University Press:  15 March 2001

E. Guilmeau ,
F. Giovannelli ,
I. Monot-Laffez ,
S. Marinel ,
J. Provost  and
G. Desgardin
E. Guilmeau
Affiliation:
CRISMAT Laboratory (UMR 6508 CNRS/ISMRA), 6 boulevard du Maréchal Juin, 14050 Caen, France
F. Giovannelli*
Affiliation:
CRISMAT Laboratory (UMR 6508 CNRS/ISMRA), 6 boulevard du Maréchal Juin, 14050 Caen, France
I. Monot-Laffez
Affiliation:
CRISMAT Laboratory (UMR 6508 CNRS/ISMRA), 6 boulevard du Maréchal Juin, 14050 Caen, France
S. Marinel
Affiliation:
CRISMAT Laboratory (UMR 6508 CNRS/ISMRA), 6 boulevard du Maréchal Juin, 14050 Caen, France
J. Provost
Affiliation:
CRISMAT Laboratory (UMR 6508 CNRS/ISMRA), 6 boulevard du Maréchal Juin, 14050 Caen, France
G. Desgardin
Affiliation:
CRISMAT Laboratory (UMR 6508 CNRS/ISMRA), 6 boulevard du Maréchal Juin, 14050 Caen, France
*
[email protected]
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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 Nd1+xBa2−xCu3Oy 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.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 13 , Issue 3 , March 2001 , pp. 157 - 160
Copyright
© EDP Sciences, 2001

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Footnotes

*

This paper has been presented in “Sixièmes journées de cryogénie et supraconductivité” at Aussois on May 16-19, 2000.

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