OPTIMIZATION OF HOLE DENSITY AND TC IN BI2(SR, CA)3CU2O8+Y BY LITHIUM ELECTROCHEMICAL REDUCTION

被引：29

作者：

STROBEL, P ^{[1
]}

BONNET, B ^{[1
]}

MOUGET, C ^{[1
]}

SOULETIE, B ^{[1
]}

机构：

[1] CNRS,CTR RECH TRES BASSES TEMP,F-38052 GRENOBLE,FRANCE

来源：

PHYSICA C | 1990年 / 172卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(90)90604-D

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Pellets of Bi-Sr-Ca-Cu-O with cation ratios 2-1.75-1.25-2 and 2.10-1.67-1-2 have been partially reduced electrochemically in lithium cells to x(Li) = 0.20. The reaction is partially reversible only (0.14 Li/formula unit) and proceeds further via a two-phase reaction, possibly involving Cu/Li substitution. The net effect on T(c) (increasing with x(Li), i.e. with decreasing hole density) and on the c-parameter is consistent with the effect of changes in hole density induced in other ways (quenching, annealing at variable oxygen pressure, alkaline-earth cation substitutions) and confirms that Bi-2212 annealed in air or oxygen and not quenched has a hole density in excess of that corresponding to the maximum T(c).

引用

页码：193 / 198

页数：6

共 32 条

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