Superconducting thin films of heavy-fermion compound CeCoIn5 prepared by molecular beam epitaxy

Abstract

Highly c-axis oriented thin films of Ce-based heavy-fermion superconductor CeCoIn5 were grown on Cr∕MgO substrates by molecular beam epitaxy. The films consist of micrograins which are strongly oriented in c axis but are random in the film plane. Kondo temperature, superconducting transition temperature, and upper critical fields of the films are very close to those of single crystals.