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J_{\rm c} Scaling and Anisotropies in Co-Doped Ba-122 Thin Films

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10 Author(s)
Jens Hanisch ; Institute for Metallic Materials, IFW Dresden, Dresden, Germany ; Kazumasa Iida ; Silvia Haindl ; Fritz Kurth
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We have successfully grown epitaxial, superconducting films of Ba(Fe1-xCox)2As2 (Ba-122)with x ~ 0.1. The films grow without observable correlated defects parallel to the c-axis, as confirmed by TEM. This is also reflected in the absence of a c-axis peak in Jc(θ). In contrast to cuprate high-Tc superconductors such as YBa2Cu3O7-δ or even Bi2Sr2Ca2Cu3O10-δ, the pnictides show a rather low anisotropic behavior in their Jc(θ) behavior as well as in their upper critical fields, Hc2. As a multiband superconductor, Ba-122 exhibits a temperature dependent electronic mass anisotropy.

Published in:

IEEE Transactions on Applied Superconductivity  (Volume:21 ,  Issue: 3 )