CRITICAL CARRIER DENSITY AND REVIVAL OF SUPERCONDUCTIVITY IN CA SUBSTITUTED YSRBACU2.6M0.4O6+Z(M=AL, FE)

被引：17

作者：

SURYANARAYANAN, R

OUHAMMOU, L

RAO, MSR

GOROCHOV, O

MUKOPADHYAY, PK

PANKOWSKA, H

机构：

[1] Laboratoire de Physique des Solides de Bellevue, CNRS

来源：

SOLID STATE COMMUNICATIONS | 1992年 / 81卷 / 07期

关键词：

D O I：

10.1016/0038-1098(92)90419-A

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on the preparation, X-ray diffraction, resistivity, hole density (p) and ac susceptibility measurements of Y(1x)Ca(x)SrBaCu2.6Al0.4O6+z. For x = 0, superconductivity (SC) is destroyed and p reaches a value of 1.5. 10(21)/cm3. SC is dramatically restored when Ca is substituted. T(c) values are 29 and 47 K for x = 0.1 and 0.2 respectively. A relation between p T(c) and x is observed. Similar data are obtained in the case of Fe(0.4) substituted samples though the maximum value of T(c) is around 30 K when 0.15 Ca is co-substituted.

引用

页码：593 / 597

页数：5

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