Thickness dependence of structural and transport properties of Co-doped BaFe sub(2)As sub(2) on Fe buffered MgO substrates

We have investigated the influence of the superconducting layer thickness, d, on the structural and transport properties of Co-doped BaFe sub(2)As sub(2) films deposited on Fe buffered MgO substrates by pulsed laser deposition. The superconducting transition temperature and the texture quality of Co...

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Bibliographic Details
Published in:Superconductor science & technology 2011-12, Vol.24 (12), p.125009-1-5
Main Authors: Iida, K, Haenisch, J, Trommler, S, Haindl, S, Kurth, F, Huehne, R, Schultz, L, Holzapfel, B
Format: Article
Language:English
Subjects:
Buffers
Cobalt
Iron
Magnesium oxide
Superconductivity
Surface layer
Texture
Transport properties
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Summary:We have investigated the influence of the superconducting layer thickness, d, on the structural and transport properties of Co-doped BaFe sub(2)As sub(2) films deposited on Fe buffered MgO substrates by pulsed laser deposition. The superconducting transition temperature and the texture quality of Co-doped BaFe sub(2)As sub(2) films improve with increasing d due to a gradual relief of the tensile strain. For d greater than or equal to 90 nm an additional 110 textured component of Co-doped BaFe sub(2)As sub(2) was observed, which leads to an upward shift in the angle-dependent critical current density at H parallel parallel c. These results indicate that the grain boundaries created by the 110 textured component may contribute to the c-axis pinning.
ISSN:0953-2048
DOI:10.1088/0953-2048/24/12/125009