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Optimization of the BaZrO3concentration in YBCO films prepared by pulsed laser deposition

Optimization of the BaZrO3concentration in YBCO films prepared by pulsed laser deposition

Authors :
A C Bódi
Y. Y. Tse
Yu. P. Stepanov
Hannu Huhtinen
J. Raittila
M. Peurla
Petriina Paturi
R. Laiho
Source :
Superconductor Science and Technology. 19:767-771
Publication Year :
2006
Publisher :
IOP Publishing, 2006.

Abstract

YBCO films were prepared by pulsed laser deposition from nanocrystalline targets doped with different concentrations of BaZrO3 ranging from c = 0.9 to 9.0 wt%. The critical temperature of the films decreases almost linearly with increasing BaZrO3 content whereas the critical current density shows a maximum near 3.9 wt%. In comparison with undoped YBCO films the accommodation field B* is considerably enhanced and the critical current density is improved in high fields in the films doped with BaZrO3, e.g. for c = 3.9 wt% by factor of 4.5 in a field of 5 T at 5 K. In the doped films the BaZrO3 particles grow epiaxially with YBCO. Transmission electron microscopy results show that the density of the BaZrO3 particles increases with increasing doping but the particle size remains practically the same (5–10 nm).

Details

ISSN :
13616668 and 09532048
Volume :
19
Database :
OpenAIRE
Journal :
Superconductor Science and Technology
Accession number :
edsair.doi...........85e59563e8562e07ed474a94a190f750
Full Text :
https://doi.org/10.1088/0953-2048/19/8/013