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arXiv · 1302.1034

Versatile fluoride substrates for Fe-based superconducting thin films

Fritz Kurth·Elke Reich·Jens Hänisch·Ataru Ichinose·Ichiro Tsukada·Ruben Hühne·Sascha Trommler·Jan Engelmann·Ludwig Schultz·Bernhard Holzapfel·Kazumasa Iida
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Abstract

We demonstrate the growth of Co-doped BaFe2As2 (Ba-122) thin films on AEF2 (001) (AE: Ca, Sr, Ba) single crystal substrates using pulsed laser deposition. All films are grown epitaxially despite of a large misfit of -10.6% for BaF2 substrate. For all films a reaction layer is formed at the interface confirmed by X-ray diffraction and by transmission electron microscopy. The superconducting transition temperature of the film on CaF2 is around 27 K, whereas the corresponding values of the other films are around 21 K. The Ba-122 on CaF2 shows identical crystalline quality and superconducting properties as films on Fe-buffered MgO.

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Fritz Kurth, Elke Reich, Jens Hänisch, Ataru Ichinose, Ichiro Tsukada, Ruben Hühne, Sascha Trommler, Jan Engelmann, Ludwig Schultz, Bernhard Holzapfel, Kazumasa Iida. 2013-02-05. Versatile fluoride substrates for Fe-based superconducting thin films. https://doi.org/10.1063/1.4801312

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