Jc Scaling and Anisotropies in Co-doped Ba-122 thin films

Details Jc Scaling and Anisotropies in Co-doped Ba-122 thin films Jc Scaling and Anisotropies in Co-doped Ba-122 thin films

2010-12-07

arxiv.org/abs/1012.1523v1

Physics

Condensed Matter

Superconductivity

contribution at ASC2010, accepted for publication in IEEE Trans. Appl. Supercond

Scientific paper

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 caxis peak in Jc({\theta}). In contrast to cuprate high-Tc superconductors such as YBa2Cu3O7-d or even Bi2Sr2Ca2Cu3O10-d, the pnictides show a rather low anisotropic behavior in their Jc({\theta}) behavior as well as in their upper critical fields, Hc2. As a multiband superconductor, Ba-122 exhibits a temperature dependent electronic mass anisotropy.

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