ENHANCED CRITICAL CURRENTS BY CEO2 ADDITIONS IN DIRECTIONALLY SOLIDIFIED YBA2CU3O7

被引：142

作者：

PINOL, S ^{[1
]}

SANDIUMENGE, F ^{[1
]}

MARTINEZ, B ^{[1
]}

GOMIS, V ^{[1
]}

FONTCUBERTA, J ^{[1
]}

OBRADORS, X ^{[1
]}

SNOECK, E ^{[1
]}

ROUCAU, C ^{[1
]}

机构：

[1] CTR ELABORAT MAT P ETUD STRUCT,CNRS,F-31055 TOULOUSE,FRANCE

来源：

APPLIED PHYSICS LETTERS | 1994年 / 65卷 / 11期

关键词：

D O I：

10.1063/1.112011

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The microstructure and critical currents of superconducting YBa2Cu3O7-Y2BaCuO5 composites with small CeO2 additions prepared using a directional solidification procedure have been investigated. The small CeO2 additions cause the decomposition of the Y2BaCUO5 phase leading to the formation of Y2O3 and BaCeO3. Experimental evidence is given for the subsequent nucleation of the Y2BaCuO5 phase on the Y2O3 particles. This new decomposition-nucleation mechanism leads to textured YBa2Cu3O7 having enhanced critical currents. An addition of 0.3 wt % CeO2 can increase J(c)ab by a factor of 2 in samples having similar concentration of Y2BaCUO5 precipitates. Critical currents above 10(5) A/cm2 at 77 K and zero field are obtained by this method.

引用

页码：1448 / 1450

页数：3

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