Abstract
The first iron based superconductor found was the La(O1-xFx)As in 2008. Although of its relative low transition temperature (Tc) of 26 K, the finding of this new compound opened a new path for superconductivity in such a way that the FeAs based superconductors are broadly discussed in the scientific community until the present days. Compounds with a Tc as high as 56 K can be synthesized b…