Superconductive material

摘要

The disclosed superconductive material has a characteristic in accordance with which electrical resistance disappears at a temperature of at least more than the boiling point of 20.3 DEG K. (-252.7 DEG C.) of liquid hydrogen and relates to La-Ba-Cu-O series superconductive material. Said superconductive material consists essentially of a composition having the formula (La1-xMx)2CuO4-x/2 wherein, M=Ba or Ba(Sr, Ca) and x=0.04 DIFFERENCE 0.20 as a main body, wherein the material has a K2NiF4 crystal structure.