Enhancement of critical current density of Dy-Ba-Cu-O bulk superconductor by the refinement of Dy211 particles

被引：24

作者：

Nariki, S ^{[1
]}

Sakai, N ^{[1
]}

Murakami, M ^{[1
]}

机构：

[1] ISTEC, Superconduct Res Lab, Tokyo 1050023, Japan

来源：

PHYSICA C | 2001年 / 357卷 / SUPPL. 2期

关键词：

melt processing; critical current density; trapped magnetic field; Dy-Ba-Cu-O;

D O I：

10.1016/S0921-4534(01)00372-0

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the relationship between the particle size of Dy2BaCuO5 (Dy211) starting powder in the precursor and the particle size of Dy211 inclusions trapped in the melt-textured bulk Dy-Ba-Cu-O. The mean diameter of Dy211 particles trapped in the DyBa2CU3Oy could be reduced with decreasing the particle size of Dy211 starting powder. The Jc was increased with reducing the size of Dy211 secondary phase. The J(c) of the bulk Dy-Ba-Cu-O sample with fine Dy211 inclusions 0.6 mum in size exhibited about 70 000 A/cm(2) at 77 K and self-field. Large c-axis oriented Dy-Ba-Cu-O/Ag bulk sample could also be fabricated with the top-seeded melt-growth process in air. The trapped magnetic fields of the bulks with the diameters of 32 and 48 mm reached high values of 1.4 and 1.7 T at 77 K, respectively. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：814 / 816

页数：3

共 3 条

[1]

FLUX PINNING BY NONSUPERCONDUCTING INCLUSIONS IN MELT-PROCESSED YBACUO SUPERCONDUCTORS [J].