AC INDUCTANCE MEASUREMENTS OF HIGH-TEMPERATURE SUPERCONDUCTOR THIN-FILMS IN DC MAGNETIC-FIELDS

被引：2

作者：

FLIPPEN, RB

FINCHER, CR

FACE, DW

HOLSTEIN, WL

机构：

[1] Central research and Development E.I. du Pont de Nemours, Co., Inc., Wilmington

来源：

PHYSICA C | 1992年 / 193卷 / 1-2期

关键词：

Oxide Superconductors - Thallium Barium Calcium Copper Oxides - Yttrium Barium Copper Oxides;

D O I：

10.1016/0921-4534(92)90881-C

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An AC inductance technique combined with a variable DC magnetic field has been used to measure at 77 K the flux exclusion properties of thin films of the high-temperature superconductors YBa2Cu3O7-x and Tl2Ba2CaCu2O8, prepared by coevaporation, in situ off-axis sputtering, or laser ablation. These results are compared to those for single crystal YBa2Cu3O7-x. A decrease in flux exclusion with applied DC field is seen for all samples, most strongly for Tl2Ba2CaCu2O8 films. The change in flux exclusion with magnetic field varies widely for YBa2Cu3O7-x samples, with some laser-ablated films showing less change in flux exclusion with magnetic field than single crystal YBa2Cu3O7-x. These results are interpreted in terms of magnetic field penetration through crystalline structures and grain boundaries in these materials.

引用

页码：145 / 153

页数：9

共 22 条

[1] MAGNETIC-FLUX PENETRATION INTO SPUTTERED HIGH - TC YBA2CU3O7-X-FILMS [J].