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近一年来,在Ba(Sr)-La-Cu-O体系中,陆续发现了一系列高Tc(30—40K)超导体。最近的报道表明,有关超导材料的研究呈现日新月异的飞速进展。本文报道一种起始转变温度为
In the past year, a series of high Tc (30-40K) superconductors have been found in the Ba (Sr) -La-Cu-O system. Recent reports show that the research on superconducting materials is showing rapid changes with rapid progress. This paper reports an initial transition temperature of