Fabrication of superconducting oxypnictide thin films
IFW Dresden - P. O. Box 270116, D-01171 Dresden, Germany, EU
Corresponding author: M.Kidszun@ifw-dresden.de
Accepted: 1 June 2010
Superconducting LaFeAsO1-xFx thin films were successfully deposited on (001)-oriented LaAlO3 substrates from stoichiometric polycrystalline LaFeAsO1-xFx targets with a fluorine concentration of up to x = 0.25. For thin film fabrication we used pulsed laser deposition at room temperature in combination with a post annealing process. In this paper we present this technique in detail, which is successfully applied on thin film growth of the iron-based “1111” LaFeAsO1-xFx compound. An extensive transmission electron microscopy analysis revealed further particulars about the formation and spacial distribution of the impurities. There are likewise promising results on growing superconducting GdFeAsO1-xFx thin films.
PACS: 74.70.Xa – Pnictides and chalcogenides / 74.78.-w – Superconducting films and low-dimensional structures / 68.55.-a – Thin film structure and morphology
© EPLA, 2010