SUPERCONDUCTING PROPERTIES OF LA2-XBIXCUO4+DELTA - SUPPRESSION OF THE PHASE-SEPARATION OBSERVED FOR LA2CUO4+DELTA

被引：14

作者：

HIROI, Z ^{[1
]}

TAKANO, M ^{[1
]}

BANDO, Y ^{[1
]}

SATO, A ^{[1
]}

TAKEDA, Y ^{[1
]}

机构：

[1] MIE UNIV,FAC ENGN,TSU,MIE 514,JAPAN

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.46.14857

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Superconducting properties of a solid solution, La2-xBixCuO4+delta (0 less-than-or-equal-to x less-than-or-equal-to 0.2), treated at high oxygen pressures were studied by dc magnetic-susceptibility measurements. A remarkably large superconducting volume fraction of up to approximately 10% was found for x > 0, though La2CuO4+delta (x = 0), which oxygenated under the same conditions, showed a fraction of at most 0.2%. These results have been discussed in relation to the phase separation in La2CuO4+delta suggested by Jorgensen et al. The Bi-for-La substitution should introduce a random potential for the interstitial oxygen atoms and, thereby, suppress the segregation of the excess oxygen atoms. The large superconducting volume then results from the uniform oxygen distribution.

引用

页码：14857 / 14860

页数：4

共 7 条

[1] PROPERTIES OF LA2CUO4 AND RELATED-COMPOUNDS [J].