Author/Authors :
Yamasaki، نويسنده , , N. and Araki، نويسنده , , Ray H. and Zakhidov، نويسنده , , A.A. and Yoshino، نويسنده , , K.، نويسنده ,
Abstract :
Thermal stability of superconducting sodium-nitrogen-C60 compound prepared from sodium azide has been studied after high temperature treatment by means of low-field signal of microwave absorption(LFS). The LFS amplitude decreased in a short time by high temperature (350∼400°C) annealing. The critical temperature Tc decreased smoothly from about 16K down to zero, indicating continuous change of superconducting composition and the average lattice constant.
