Abstract
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.
