Influence of porosity on the critical currents of trifluoroacetate-MOD YBa2Cu3O7 films

被引：32

作者：

Castaño, O ^{[1
]}

Cavallaro, A ^{[1
]}

Palau, A ^{[1
]}

González, JC ^{[1
]}

Rosell, M ^{[1
]}

Puig, T ^{[1
]}

Piñol, S ^{[1
]}

Mestres, N ^{[1
]}

Sandiumenge, F ^{[1
]}

Pomar, A ^{[1
]}

Obradors, X ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat Barcelona, Barcelona, Spain

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2003年 / 13卷 / 02期

关键词：

coated conductors; critical currents; superconducting thin films;

D O I：

10.1109/TASC.2003.811832

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The influence of porosity on the superconducting properties have been investigated on YBa2Cu3O7 thin films deposited on LaAlO3 (100) substrates by the so-called Trifluoroacetate (TFA) route. Micro-Raman spectroscopy have been used to determine the concentration of c-axis grains delta in different samples and their influence on the final film porosity as observed from SEM imaging. This has been compared with measurements of resistivity and critical currents in the same samples. We prove that this delta fraction is the main parameter controlling the porosity and hence the normal-state resistivity of the thin films. The optimization of the microstructure of these YBa2Cu3O7 TFA films allow to have high critical currents : J(c) = 3 x 10(6) A/cm(2) at 77 K.

引用

页码：2504 / 2507

页数：4

共 20 条

[1] High-Jc YBa2CU3O7-x films on metal tapes by the metalorganic deposition method using trifluoroacetates [J].