Thickness dependence of structural and transport properties of Co-doped BaFe2As2 on Fe buffered MgO substrates

Details Thickness dependence of structural and transport properties of Co-doped BaFe2As2 on Fe buffered MgO substrates Thickness dependence of structural and transport properties of Co-doped BaFe2As2 on Fe buffered MgO substrates

2011-11-16

arxiv.org/abs/1111.3918v1

Supercond. Sci. Technol. 24 (2011) 125009

Physics

Condensed Matter

Superconductivity

6 figures

Scientific paper

10.1088/0953-2048/24/12/125009

We have investigated the influence of the superconducting layer thickness, d, on the structural and transport properties of Co-doped BaFe2As2 films deposited on Fe-buffered MgO substrates by pulsed laser deposition. The superconducting transition temperature and the texture quality of Co-doped BaFe2As2 films improve with increasing d due to a gradual relief of the tensile strain. For d>90 nm an additional 110 textured component of Co-doped BaFe2As2 was observed, which leads to an upward shift in the angular dependent critical current density at H // c. These results indicate that the grain boundaries created by the 110 textured component may contribute to the c-axis pinning.

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