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YBa2Cu3O7-δ thin films deposited by pulsed laser deposition and radio-frequency assisted pulsed laser deposition

G. STANCIU1,* , N. D. SCARISOREANU2, V. ION2, A. MOLDOVAN2, E. ANDRONESCU1, M. DINESCUb2

Affiliation

  1. University Politehnica of Bucharest, Faculty of Applied Chemistry and Material Science, Bucharest, Romania
  2. National Institute for Lasers, Plasma and Radiation Physics, Magurele, Romania

Abstract

Epitaxial High-Critical Temperature Superconducting thin films are obtained by pulsed laser deposition only at very high substrate temperatures (≥ 780 °C) and using post-deposition treatments, which restrict their applicability and common substrates integration possibilities. In this work, we report on YBa2Cu3O7-δ epitaxial thin films growth at two different substrate temperatures, the classic 780 oC and 730 oC. The layers have been deposited by pulsed laser deposition. For lower deposition temperature experiments (730 0C), a radio-frequency oxygen plasma discharge working at 200 W has been added. Morphological (atomic force microscopy), structural (X-ray diffraction), optical (spectrometric ellipsometry) and electrical investigations have been performed for films characterization, as well as AC magnetic susceptibility measurements. A correlation between the deposition conditions and YBa2Cu3O7-δ thin films functional properties has been performed..

Keywords

Superconductivity, YBCO, Thin films, Pulsed laser depositions, Radio-frequency oxygen plasma.

Submitted at: Aug. 28, 2012
Accepted at: Sept. 20, 2012

Citation

G. STANCIU, N. D. SCARISOREANU, V. ION, A. MOLDOVAN, E. ANDRONESCU, M. DINESCUb, YBa2Cu3O7-δ thin films deposited by pulsed laser deposition and radio-frequency assisted pulsed laser deposition, Journal of Optoelectronics and Advanced Materials Vol. 14, Iss. 9-10, pp. 852-857 (2012)