Disorder effects on the superconducting properties of BaFe₁.₈Co₀.₂As₂ single crystals
Eisterer, M. · Zehetmayer, M. · Weber, H. W. · Jiang, J. · Weiss, J. D. · Yamamoto, A. · Hellstrom, E. E.
Original · EN
Single crystals of superconducting BaFe₁.₈Co₀.₂As₂ 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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