Superconductivity

We use the following notation throughout this Report : T, for the transition temperature in zero magnetic field, He for the critical field (threshold value) and IC for the critical current.* It should, however, be noted that the recently determined chemical properties of the nsuranic elements seem to indicate that uranium may be a member of a new rare earth group This means that the electronic configuration of uranium need not which starts with actinium.necessarily correspond to group VI of the periodic table.* Superconductivity of the compound Bi,Ni, consisting of two non-superconductive components, has recently been reported by Alekseyevsky (1945 c).The argument is as follows.* Impurities and stain may shift Tc to higher or lower temperatures