The influence of the structure on the electrical and magnetic properties of Bi2Sr2CaCu2O8+delta single crystals

被引：4

作者：

Aldica, G ^{[1
]}

Crisan, A ^{[1
]}

VelterStefanescu, M ^{[1
]}

Mandache, S ^{[1
]}

Bunescu, MC ^{[1
]}

机构：

[1] METAV SA,BUCHAREST,ROMANIA

来源：

JOURNAL OF MATERIALS SCIENCE | 1997年 / 32卷 / 05期

关键词：

D O I：

10.1023/A:1018579817471

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The correlation between the structure, chemical composition, electrical and magnetic properties of Bi2Sr2CaCu2O8+delta single crystals is presented. As revealed by SEM measurements, the small samples (approximately 1 mm x 1 mm x 0.2 mm) are stacks of thin plates (1-2 mu m). Microcompositional measurements (energy dispersive spectroscopy) show the Bi2Sr2CaCu2O8+delta (2212)-phase and a small quantity of residual phases enriched in bismuth and strontium and calcium-deficient. Magnetically modulated microwave absorption measurements (MAMMA) lead to a value for the anisotropy of the upper critical field of about 7, which is more than twice the reported value for YBa2Cu3O7-delta single crystals (also determined from MAMMA responses). The plot of the resistance versus temperature suggests that only the first 10-20 plates from the surface of the sample have a contribution to the sample conductivity. The imaginary part, chi'', of the magnetic susceptibility of our samples shows three peaks.

引用

页码：1195 / 1199

页数：5

共 15 条

[1] INFLUENCE OF FLUCTUATION PAIRING OF ELECTRONS ON CONDUCTIVITY OF NORMAL METAL [J].