Disorder effects on the superconducting properties of BaFe$_{1.8}$Co$_{0.2}$As$_2$ single crystals

Details Disorder effects on the superconducting properties of BaFe$_{1.8}$Co$_{0.2}$As$_2$ single crystals Disorder effects on the superconducting properties of BaFe$_{1.8}$Co$_{0.2}$As$_2$ single crystals

2009-07-17

arxiv.org/abs/0907.3072v1

Supercond. Sci. Techn. 22 (2009) 095011

Physics

Condensed Matter

Superconductivity

Scientific paper

Single crystals of superconducting BaFe$_{1.8}$Co$_{0.2}$As$_2$ were exposed to neutron irradiation in a fission reactor. The introduced defects decrease the superconducting transition temperature (by about 0.3 K) and the upper critical field anisotropy (e.g. from 2.8 to 2.5 at 22 K) and enhance the critical current densities by a factor of up to about 3. These changes are discussed in the context of similar experiments on other superconducting materials.

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