在超导体TlCaSr_2Cu_2O_x中掺入Pb、Sn、Al、K、Cr、Y、V、Ni、Fe对T_c的影响

Influences of Doping the Superconductor TlCaSr_2Cu_2O_x with Elements Pb, Sn, Al, K, Cr, Y, V, Ni, Fe on T_c

在ＴｌＣａＳｒ２Ｃｕ２Ｏｘ中掺入Ｐｂ或Ｐｂ和Ｓｎ或Ａｌ和Ｋ，这些掺入元素都能部分代替Ｔｌ；接入Ｃｒ或Ｙ可部分代替Ｃａ；掺入Ｖ则可部分代替Ｃａ和Ｔｌ；掺入上述元素后Ｔｃ都升高。如果掺入Ｎｉ或Ｆｅ，则会部分代替Ｃｕ，Ｔｃ下降。从接入元素的离子结构讨论了上述现象的原因。

Doping the superconductor TlCaSr_2Cu_2O_x with Pb, Pb and Sn, or Al and K, all the doping elements can be partly substituted for Tl; doping with Cr or Y can partly substituted for Ca, while with V can be partly substituted for Ca and Tl, It is found that the Tc increases when the above elements are dopped. Doping with Ni or Fe, they can be partly substituted for Cu, and the Tc decreases. On the basis of the ionic structure the above phenomena were discussed.