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超导性
1911 - Heike Kamerlingh -Onnes,1853 -1926 4.173K - - Nb3 ,Sn,Nb3AI Nb3Ge 23.2K 1933 Hc1, Hc2 Hc1 Hc2 Nb3Sn Hc2 Nb3AI0.75Ge0.25 Hc2 30 1962 - Josephson