Superconducting Technetium-Tungsten Alloys
Abstract
The transition temperatures, critical fields, electrical resistivities, and crystalline structures of a series of technetium-tungsten alloys containing up to 60 at.% technetium are reported. Tc increases monotonically to 7.9°K and Hc2 (at 4.2°K) to 43.5 kG for 60 at.% technetium. The samples are single-phase solid solutions up to 40 at.% Tc, but a sigma phase is present at higher concentrations. The measured values of Hc2 are in good agreement with calculated values based on the BCS and Ginsberg-Landau-Abrikosov-Gor'kov theories and with our resistivity measurements.
- Publication:
-
Physical Review
- Pub Date:
- November 1965
- DOI:
- 10.1103/PhysRev.140.A1177
- Bibcode:
- 1965PhRv..140.1177A