J. Phys. IV France 11 (2001) Pr10-217-Pr10-220
Critical parameters for the preparation of TI-1223 superconducting films by spray pyrolysisS. Phok1, A. Sin2, Z.I. Supardi2, Ph. Galez1, J.L. Jorda1 and F. Weiss2
1 LAIMAN, Université de Savoie, 9 rue de l'Arc-en-ciel, BP. 240, 74942 Annecy-le-Vieux cedex, France
2 Laboratoire des Matériaux et du Génie Physique, INPG-CNRS, BP. 46, 38042 Saint-Martin-d'Hères cedex, France
Thick films of the high temperature TIBa2Ca2Cu3Oz superconductor have been prepared from a precursor Ba2Ca2Cu3Oz obtained by spray pyrolysis. In this paper, we report on the parameters which mainly control the formation of the superconducting phase : the composition of the nitrates solution, the substrate temperature and the subsequent ex-situ thallination annealing. The sample were analyzed by X-ray diffraction and by secondary electron microscopy. Epitaxial film ( 1 to 2 µm thick ) with a critical temperature Tc=107 K and a critical density of current Jc(77 K, OT)=2.103 A/cm2 have been obtained.
© EDP Sciences 2001