关于Bi系高T_c超导体的阳离子掺杂研究（Ⅰ）──Al－Pb，Mg－Pb和Mn－Pb二元掺杂后超导体的超导电性和结构

讨论了Ａｌ－Ｐｂ，Ｍｇ－Ｐｂ和Ｍｎ－Ｐｂ等二元阳离子掺杂对Ｂｉ系高Ｔ_ｃ超导相出现时间的影响。试验中发现，前人较少讨论的Ｍｇ~（３＋）或Ａｌ~（３＋）离子在高Ｔ_ｃ相形成时，进入到高Ｔ_ｃ超导体晶格的特定位置，它们在高Ｔ_ｃ超导相中起着各自不同的作用机制，从而影响了高Ｔ_ｃ超导相的结构和超导电性。结果表明，Ｍｇ－Ｐｂ，Ａｌ－Ｐｂ和Ｍｎ－Ｐｂ等二元阳离子的掺杂是加快高Ｔ_ｃ超导相形成和提高Ｂｉ系高Ｔ_ｃ超导相超导电性的有效途径，它们的掺杂有利于Ｂｉ系高Ｔ_ｃ相的形成。

On the Cations-doped Study of High Tc Superconductor in Bi-system(I)── The Structure and Superconductivity of the Superconductor with Doping Binary Cations,Al─Pb,Mg─Pb and Mn─Pb etc.

In this paper,it is discussed that the effect of doping binary cations, Mg-Pb, Al-Pb and Mn-Pb etc. on the time of the appearance of high Tc phase in superconductor of Bi-system. In this experiment,we find that cations of Al3+ and Mg2+ have inserted into certain positions of the crystal lattice of high Tc phase,which has rarely been discussed in literature before,they respectively play important roles in the formation of high Tc phase in Bisystem,and have an effect on the structure of high T. phase and the superconductivity. As a result of these, the doping binary cations, Mg-Pb, Al-Pb and Mn-Pb etc. ,speed up the formation of high Tc phase and raise the superconductivity.The doping is very favorable for the formation of high Tc phase.