Critical current density and irreversibility line in melt-textured YBCO with CeO2 addition

被引：0
|
作者：
Lee, KW [1 ]
Kim, CJ [1 ]
Park, YK [1 ]
Park, JC [1 ]
机构：
[1] KOREA ATOM ENERGY RES INST,TAEJON 305600,SOUTH KOREA
来源：
CHINESE JOURNAL OF PHYSICS | 1996年 / 34卷 / 02期
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D O I：
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中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We prepared melt-textured YBCO with CeO2 addition in order to enhance flux pinning. SEM photographs showed that Y2BaCuO5 precipitates of about 1 mu m size were uniformly distributed in YBCO grains. Magnetization hysteresis at various temperatures was measured to investigate critical current density using a SQUID magnetometer. Critical current density at 77 K in a field of 1 T was about 2 x 10(4) A/cm(2) and increased by lowering temperature. The irreversibility line determined from the closing points of the magnetization hysteresis was shifted to high fields. The temperature dependence of the irreversibility field followed a power law, H-irr proportional to (1-T/T-c)(n) with n approximate to 1.4.
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页码：702 / 705
页数：4
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