FeSe$${}_{\mathbf{0.5}}$$Te$${}_{\mathbf{0.5}}$$ Films on Glass with CeO$${}_{\mathbf{2}}$$ Doping

Deposition modes for thin films of FeSe $${}_{0.5}$$ Te $${}_{0.5}$$ on an amorphous substrate made of K-208 glass, containing cerium oxide (CeO $${}_{2}$$ ), have been found. The transition temperature of the film, $$T_{\textrm{C}}=9.5$$ K, to the superconducting state turned out to be higher than that on borosilicate glass from Fischer Scientific, which does not contain CeO $${}_{2}$$ , but lower than the superconducting transition temperature of the target, $$T_{\textrm{C}}(M)=14$$ K. This behavior contrasts with the well-known properties of thin films in the FeSe and FeSe $${}_{x}$$ Te $${}_{1-x}$$ family on crystalline substrates. Based on the measurement results, the vortex activation energy (U), the critical current density ( $$j_{\textrm{C}}$$ ), the upper critical field ( $$H_{C2}$$ ), and the irreversibility field ( $$H_{\textrm{irr}}$$ ) have been obtained.