Influence of epitaxial growth on superconducting properties of LFZ Bi-Sr-Ca-Cu-O fibres .2. Magnetic susceptibility and transport properties

被引：9

作者：

Costa, FM ^{[1
]}

Silva, RF ^{[1
]}

Vieira, JM ^{[1
]}

机构：

[1] UNIV AVEIRO, DEPT ENGN CERAM & VIDRO, P-3810 AVEIRO, PORTUGAL

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1997年 / 289卷 / 3-4期

关键词：

nucleation; annealing; superconductors; fibres;

D O I：

10.1016/S0921-4534(98)80030-0

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetic susceptibility and critical current density of superconducting fibres of the Bi-Sr-Ca-Cu-O system grown by laser floating zone (LFZ) technique are strongly dependent on pulling rates. A favourable grain orientation for current transport was obtained for the highest pulling rate, 4.17 x 10(-6) ms(-1). Fibres grown in this condition show the lowest fraction of superconducting phases but exhibit the highest values of J(c). Epitaxial growth of superconducting phases 2212 and 4413 on the primary phase to crystallize, Sr0.3Ca0.7CuO2 (1/1), leads to the favourable alignment of the b-axis to the fibre axis. After heat treatment this orientation remains in the new crystals of 2212 and 2223 phases. (C) 1997 Elsevier Science B.V.

引用

页码：171 / 176

页数：6

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