  The high upper critical field characteristic of the recently discovered
iron-based superconducting chalcogenides opens the possibility of developing a
new type of non-oxide high-field superconducting wires. In this work, we
utilize a buffered metal template on which we grow a textured
FeSe$_{0.5}$Te$_{0.5}$ layer, an approach developed originally for high
temperature superconducting coated conductors. These tapes carry high critical
current densities (>1$\times10^{4}$A/cm$^{2}$) at about 4.2K under magnetic
field as high as 25 T, which are nearly isotropic to the field direction. This
demonstrates a very promising future for iron chalcogenides for high field
applications at liquid helium temperatures. Flux pinning force analysis
indicates a point defect pinning mechanism, creating prospects for a
straightforward approach to conductor optimization.
