SUPERCONDUCTIVITY IN (PB/CU)-1222 COPPER OXIDES

被引：25

作者：

SAKAI, N

MAEDA, T

YAMAUCHI, H

TANAKA, S

机构：

[1] Superconductivity Research Laboratory, International Superconductivity Technology Center, Koto-ku, Tokyo, 135, 10-13

来源：

PHYSICA C | 1993年 / 212卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(93)90487-B

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The superconductivity in (Pb/Cu)-''1222'' cuprates, (Pb, Cu)(Sr, Ln)2(Ln, Ce)2Cu2Oz (Ln=Sm, Eu, Gd, Dy and Ho), has been found to be strongly dependent on the oxygen content as well as on the species of Ln ion. While the samples with Ln = Sm, Eu, Gd and Dy prepared in O2 at an ambient pressure exhibit superconductivity, those with Ln = Ho required post-annealing in O2 of a high pressure to become superconductors. It was likely that the ionic radius of Ln3+ and oxygen stoichiometry were strongly related to each other and both played important roles in the occurrence of superconductivity in the (Pb/Cu)-''1222'' compounds.

引用

页码：75 / 80

页数：6

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