Superconducting alloys of interstitial compounds

Abstract

The preparation and evaluation of some interstitial compounds is described and their potential as high transition temperature superconductors discussed. An evalu­ ation of transition temperature measurements of pseudo-binary and ternary inter­ stitia l alloys shows that no simple direct relationship exists between transition temperature and such quantities as valence electron-atom ratio, mass and lattice volume. However, the experimental data have been successfully systematized in terms of a general empirical model which appears capable of predicting the most promising materials for attaining high transition temperatures. Preliminary data demonstrate that a large number of alloyed interstitial compounds exhibit transition tempera­ tures in the vicinity of 18°K.