โ Scribed by W.H Keesom
No coin nor oath required. For personal study only.
Some metals have been investigated to lower temperatures as to the question whether they become supraconductors.
Zinc becomes supraconductive at 0.79ยฐK. Cadmium and gold are not yet supraconductive at 0.73ยฐK. Platinum is not yet supraconductive at 0.77ยฐK. As phosphorbronze is not yet supraconductive at 0.75ยฐK. we can readily accept that copper is not yet supraconductive at that temperature.
๐ SIMILAR VOLUMES
The transition from the s u p r a c o n d u c t i v e state to the non-supraconductive state of monocrystalline spheres of tin has been studied. First the t e m p e r a t u r e was held constant and a magnetic field applied, the intensity of which was gradually raised until s u p r a c o n d u c t i
Calorimetric experiments were performed on thallium in connection with the transition, in a constant magnetic field, from the supraconductive to the non-supraconductive state. A definite latent heat was measured. The values found were compared with thermodynamic theory. From the experimental data a