ENHANCED CRITICAL-CURRENT DENSITY IN MELT-TEXTURED (Y1-XPRX)BA2CU3OY

被引：24

作者：

REN, HT ^{[1
]}

TAYLOR, KNR ^{[1
]}

CHEN, YJ ^{[1
]}

XIA, JA ^{[1
]}

QING, H ^{[1
]}

机构：

[1] UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996

来源：

PHYSICA C | 1993年 / 216卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(93)90088-8

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated the dependence of the magnetisation critical current density J(c) of Pr-substituted YBa2Cu3Oy on the percentage praseodymium content (for 0, 2, 4 and 8% substitution) using a vibrating sample magnetometer. Although the critical temperature of these pseudo-quaternary compounds Y1-xPrxBa2Cu3Oy decreases gradually as x increases, a maximum in the critical current density is observed for x=0.04. At this composition the critical current density is about three times higher than that in a pure YBa2Cu3Oy sample prepared in the same way. From a discussion of the possible mechanisms it is suggested that J(c) increases as a result of pinning force enhancement due to Pr substitution. This may be associated with the fact that the atomic volume of Pr is larger than that of Y. It is also possible that Pr-containing compound particles (I 23 or 21 1 ) are finely dispersed in the Y123 superconducting phase leading to increased pinning, and consequently to higher J(c) values.

引用

页码：447 / 452

页数：6

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