Superconducting properties of rapidly quenched and heat treated Zr-V and Hf-V foils

The results of rapid quenching and subsequent heat treatments on the superconducting properties of the Zr-V and Hf-V and Hf-V binary systems are presented. Metallic glasses can be prepared in these systems which have very attractive properties for practical application. The existence of a flexible glassy phase raises the prospect of alternative methods for the construction of superconducting devices. As-quenched, partially crystalline material is characterized by small critical currents, yet relatively large upper critical fields and transition temperatures. Heat treatments considerably enhance the current carrying capability. (orig./CDS) 891 CDS/orig.- 892 ARA