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Since the discovery of high Tc superconductivity in La-Ba-Cu-O system,great progress of research on high Tc superconductivity in oxides have beenmade. Up to now, almost all rare earth elements Lave been substitutedsystems except Ba-(Ce, Pr, Tb)-Cu-O are found to be superconductors whichunually have much higher Tc than in La-Ba-Cu-O. Many experimental results 相似文献
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