FLUX-PINNING IN MELT-GROWN NDBA2CU3OY AND SMBA2CU3OY SUPERCONDUCTORS

被引：273

作者：

MURAKAMI, M

YOO, SI

HIGUCHI, T

SAKAI, N

WELTZ, J

KOSHIZUKA, N

TANAKA, S

机构：

[1] International Superconductivity Technology Center, Superconductivity Research Laboratory, Minato-ku, Tokyo, 105

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1994年 / 33卷 / 5B期

关键词：

NDBA(2)CU(3)O(7); SMBA(2)CU(3)O(7); SOLID SOLUTION; FLUX PINNING; CRITICAL CURRENT DENSITY; IRREVERSIBILITY FIELD; MELT PROCESS; OXYGEN PARTIAL PRESSURE;

D O I：

10.1143/JJAP.33.L715

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

REBa2Cu3Oy superconductors with rare earth (RE) ions with large radii (RE: La, Nd, Sm) exhibit relatively low T(c) due to the presence of RE-Ba solid solution. We have found that this solid solution can be suppressed if these superconductors are melt processed in a reduced oxygen atmosphere. We have also found that critical current densities of these superconductors are higher than those of melt processed YBa2Cu3Oy with fine Y2BaCuO5 inclusions in a high field region. The irreversibility line was also shifted toward the higher H-T region. We believe that flux pinning in these superconductors is ascribable to a finely distributed RE(Ba1-x, REx)2Cu3Oy phase in a good superconductive matrix.

引用

页码：L715 / L717

页数：3

共 9 条

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