| 摘要 |
PURPOSE:To provide the subject superconductor itself capable of being used as a superconductor, enabling to develop into a substituted solid solution, etc., and useful a raw material for synthesizing superconductors having high critical temperatures by employing a composition containing three kinds of specific elements in a prescribed mol ratio. CONSTITUTION:The multimetal chalcogenide superconductor has a composition represented with the formula wherein A is at least one element selected from Bi, Sb and As; B is at least one element selected from Nb and Ta; C is at least one element selected from S, Se and Te; 0.8<=x<=1.2; 1.6<=y<=2.4; 4<=z<=6. The multimetal chalcogenide superconductor is prepared by weighting the element powders or metal chalcogenide powders of the components corresponding to the composition of the formula in the composition ratio, vacuum-sealing the powders in a heat-resistant and oxidation-resistant container and subsequently heating the sealed powders at a temperature of approximately 400-1200 deg.C. |
