Influence of epitaxial growth on superconducting properties of LFZ Bi-Sr-Ca-Cu-O fibres .1. Crystal nucleation and growth

被引：19

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 | 1997年 / 289卷 / 3-4期

关键词：

nucleation; epitaxial; superconductors; fibres;

D O I：

10.1016/S0921-4534(98)80029-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Laser floating zone (LFZ) of superconducting fibres is a controlled growth technique where axially aligned structures are developed. The process is applied to the Bi-Sr-Ca-Cu-O ceramic system where Sr0.3Ca0.7CuO2 (1/1) crystallizes as primary phase with a dendritic morphology, followed by the crystallization of the superconducting phases Bi2Sr2CaCu2O8 (2212) and Bi4Sr4CaCu3O14 (4413) in the interdendritic spacing. The most favourable orientation for 1/1 dendrites shows the b-axis parallel to the pulling direction. The epitaxial orientation between the superconducting (S) phases that nucleate on the surfaces of the primary cuprate (1/1) is determined as (100)(S)[010](S) parallel to(001)(1/1)[010](1/1). The superconducting phases 2212 and 4413 have the b-axis aligned to the pulling direction and the a-and c-axis rotated pi/2 with respect to the homologous axes of the 1/1 crystals. (C) 1997 Elsevier Science B.V.

引用

页码：161 / 170

页数：10

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