Fabrication of superconducting oxypnictide thin films

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 combinati...

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Bibliographic Details
Published in:Europhysics letters 2010-06, Vol.90 (5), p.57005
Main Authors: Kidszun, M, Haindl, S, Thersleff, T, Werner, J, Langer, M, Hänisch, J, Iida, K, Reich, E, Schultz, L, Holzapfel, B
Format: Article
Language:English
Subjects:
68.55.-a
74.70.Xa
74.78.-w
Annealing
Deposition
Electron microscopy
Fluorine
Impurities
Pulsed laser deposition
Superconductivity
Thin films
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Summary: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.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/90/57005