SUPERCONDUCTIVITY IN LA-DOPED BI-2201

被引：24
作者：
SINCLAIR, DC
TAIT, S
IRVINE, JTS
WEST, AR
机构：
[1] University of Aberdeen, Department of Chemistry, Aberdeen, AB9 2UE, Meston Walk
来源：
PHYSICA C | 1993年 / 205卷 / 3-4期
关键词：
D O I：
10.1016/0921-4534(93)90398-A
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
La3+ substitution into the Bi 2201 structure, of the ''ideal'' composition Bi2Sr2CuOdelta, has been investigated by means of an extensive phase diagram study into the solid solution formation al 885-degrees-C in air. Single phase solid solutions may be represented by the formula Bi2+xSr2-x-yLayCuOdelta, where y has a maximum value of 0.6, With increasing La content, the crystal symmetry changes from orthorhombic to tetragonal and the incommensurate supercell becomes less pronounced, as indicated by a decrease in intensity of the supercell X-ray powder reflections. Superconducting T(conset) values vary systematically with cation contents x, y and oxygen content delta; a maximum T(c) of 36.5 K is observed for composition x= -0.05, y=0.4.
引用
收藏
页码：323 / 328
页数：6
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