MICROSTRUCTURE AND FLUX PINNING IN SUPERCONDUCTING BI-PB-SR-CA-CU-O WIRES

被引：30

作者：

DOU, SX ^{[1
]}

LIU, HK ^{[1
]}

WANG, J ^{[1
]}

APPERLEY, MH ^{[1
]}

SORRELL, CC ^{[1
]}

GUO, SJ ^{[1
]}

LOBERG, B ^{[1
]}

EASTERLING, KE ^{[1
]}

机构：

[1] LULEA UNIV TECHNOL,DEPT ENGN MAT,S-95187 LULEA,SWEDEN

来源：

PHYSICA C | 1990年 / 172卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(90)90643-S

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The critical current density (J(c)) of Ag-clad Bi-Pb-Sr-Ca-Cu-O wire has been measured to be 1.2 x 10(4) A/cm2 at 77 K in zero field. The high J(c) is attributed to a combination of elimination of the poisoning effect of Ag on superconductivity, grain alignment, and enhancement of flux pinning. J(c)-H dependence was significantly improved in the Ag-clad tape, which has a J(c) of 1.0 x 10(3) A/cm2 at 77 K and 4000 Oe, while the J(c) of the sintered pellet drops two orders of magnitude at only 100 Oe. A pronounced anisotrophy in J(c) under high magnetic field is attributed to the grain alignment. Planar defects, such as heavy stacking faults parallel to the a-b plane in the rolled tape, are considered to be effective pinning centres.

引用

页码：63 / 70

页数：8

共 15 条

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[2] THE ROLE OF GRAIN-BOUNDARIES IN DETERMINING JC IN HIGH-FIELD HIGH-CURRENT SUPERCONDUCTORS [J].