Anisotropy of the critical current in YBCO thin films grown by metal organic chemical vapour deposition

被引：3

作者：

Dubourdieu, C ^{[1
]}

Lebedev, O ^{[1
]}

Delabouglise, G ^{[1
]}

Weiss, F ^{[1
]}

Schmatz, U ^{[1
]}

Senateur, JP ^{[1
]}

机构：

[1] ECOLE NATL SUPER PHYS GRENOBLE, MAT & GENIE PHYS LAB, UMR CNRS 5628, F-38402 ST MARTIN DHERES, FRANCE

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1997年 / 251卷 / 1-2期

关键词：

anisotropy; critical current; YBCO thin films;

D O I：

10.1016/S0925-8388(96)02702-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A study of the anisotropy of the critical current in YBCO films is reported. The films have been grown on LaAlO3 substrates by metal organic chemical vapour deposition. Current-voltage (I-V) measurements have been performed on microbridges using a single pulsed method. The angular magnetic field dependence of the critical current density J(c)(theta) has been measured for temperatures close to T-c and down to 40 K. Films having different fraction of a-axis grains are compared. Significant differences that may be attributed to the differences in microstructure are stressed out. In particular films with a larger amount of a-axis grains exhibit an enhanced pinning when H is parallel to the substrate normal, indicating a flux pinning mechanism that is directionally oriented.

引用

页码：351 / 354

页数：4

共 11 条

[1] SUPERCURRENT LENGTH SCALE CROSSOVER AND TWIN BOUNDARIES IN YBA2CU3O7-DELTA SINGLE-CRYSTALS [J].