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Superconductors; YBa₂Cu₃O$_x$, Bi₂Sr₂Ca₁Cu₂O$_x$; metal-organic deposition; films.

YBa₂Cu₃O$_x$ (Y-123 ) and Bi₂Sr₂Ca₁Cu₂O$_x$ (Bi-2212) films on various substrates have been prepared by Metal-Organic Deposition starting from different metallorganic fluorine-free compounds and using a very simple instrumentation. The processing conditions include a rapid pyrolysis step in air and an annealing step in oxygen for Y-123 and in air for Bi-2212. The films obtained have been characterized by X-ray diffraction (XRD) and the formation of a superconducting phase of Y-123 or Bi-2212 was confirmed measuring the critical temperature ($T_c$) with Ac-susceptibility and resistive measurements. Microstructure and final cationic ratios have been studied by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS).

Paola Benzi^{1 2} Elena Bottizzo¹ Chiara Demaria¹ Nicoletta Rizzi¹

1. Dipartimento di Chimica Generale ed Organica Applicata and NIS Centre of Excellence, Università degli Studi di Torino, Corso Massimo d'Azeglio 48, 10125 Torino
2. Istituto Nazionale di Fisica della Materia, Villa Brignole, Corso Perrone 24, 16152 Genova, Italy

Published

November 2007

Manuscript received

3 August 2007

Manuscript revised

23 November 2007