STRUCTURAL PHASE-DIAGRAM FOR SUPERCONDUCTING CUPRATES - SOLID-STATE PROCESSING FOR ENHANCED FLUX PINNING

被引：6

作者：

TALLON, JL

POOKE, DM

BUCKLEY, RG

PRESLAND, MR

MAWDSLEY, A

GILBERD, PW

机构：

[1] DSIR Physical Sciences, Lower Hutt

来源：

PHYSICA C | 1992年 / 194卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(92)90683-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The phase boundaries in the Y/Ba/Cu/O system for 1-2-3, 2-4-7 and 1-2-4 are determined and each of these defines a possible domain for solid-state heat-treatment to produce flux-pinning precipitates. Thirteen cuprate perovskites are examined and all with T(c) > 60 K have a common low pressure boundary which coincides with the boundary between CuO and Cu2O. By phase transformation of La-substituted 1-2-4 over this boundary to La 1-2-3, flux pinning is enhanced 20-fold at 77 K and 50-fold at 85 K relative to unsubstituted 1-2-3.

引用

页码：150 / 152

页数：3

共 4 条

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