Pressure effects on strained FeSe$_{0.5}$Te$_{0.5}$ thin films

FeSe is the simplest structure in the family of the iron pnictides, with a reported superconducting transition of 8K for the $\alpha$-PbO- type structure. With the substitution of Te for Se, FeSe$_{0.5}$Te$_{0.5}$, was found to have an increased superconducting transition up to 15.2 K. To investigate the strain effect on the superconducting properties of the FeSe$_{0.5}$Te$_{0.5}$, thin films were grown under different conditions. The Tc and the normal state properties show a correlation to the induced strain of the system. The application of external pressure resulted in an increase of T$_c$, but at different rates depending on the pre-existent strain in the system.