SEMICONDUCTING TLSR2RCU2O7 (R = RARE-EARTH) AND ITS SUPERCONDUCTING DERIVATIVES

被引：30

作者：

SHENG, ZZ

XIN, Y

GU, DX

MEASON, JM

BENNETT, J

FORD, D

PEDERSON, DO

机构：

[1] Department of Physics, University of Arkansas, Fayetteville, 72701, AR

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1991年 / 84卷 / 03期

关键词：

D O I：

10.1007/BF01314007

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Semiconducting TlSr2RCu2O7 (R = Pr or Er) with a 1212-type structure has been synthesized in the single-phase form. Partial substitution of Sr2+ for R3+ converts this semiconductor to a 90 K superconductor TlSr2(R1-ySr(y))Cu2O7. A combination substitution, Sr2+ for R3+ and Pb4+ for Tl3+, leads to the Ca-free 100 K superconductor (Tl, Pb)Sr2(R, Sr)Cu2O7. The results are explained in the framework of the mixed Cu2+/Cu3+ valence.

引用

页码：349 / 352

页数：4

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