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Transport Property Improvement by Means of BZO Inclusions in PLD Grown YBCO Thin Films

Authors :
Sergey Rubanov
G. Celentano
U. Gambardella
Antonella Mancini
Traian Petrisor
Nicola Pompeo
V. Galluzzi
Enrico Silva
A. A. Angrisani
Lelia Ciontea
Angelo Vannozzi
Andrea Augieri
Alessandro Rufoloni
Augieri, A
Galluzzi, V
Celentano, G
Angrisani, Aa
Mancini, A
Rufoloni, A
Vannozzi, A
Silva, Enrico
Pompeo, Nicola
Petrisor, T
Ciontea, L
Gambardella, U
Rubanov, S.
A., Augieri
V., Galluzzi
G., Celentano
A. A., Angrisani
A., Mancini
A., Rufoloni
A., Vannozzi
E., Silva
T., Petrisor
L., Ciontea
U., Gambardella
S., Rubanov
Source :
IEEE Transactions on Applied Superconductivity. 19:3399-3402
Publication Year :
2009
Publisher :
Institute of Electrical and Electronics Engineers (IEEE), 2009.

Abstract

A detailed study on YBa(2)Cu(3)O(7-delta) (YBCO) films with BaZrO(3) (BZO) inclusions (YBCO-BZO) deposited on SrTiO(3) substrate with different BZO contents is presented. X ray diffraction, SEM imaging and superconductive critical temperature (T(c)) measurements were performed to evaluate film growth quality. Independently from the BZO content, all YBCO-BZO films showed T(c) values close to that of pure YBCO indicating that the T(c) reduction which is usually observed on YBCO-BZO films can be successfully recovered by changing the deposition conditions. All YBCO-BZO films showed an improved critical current density (J(c)) dependence on magnetic field if compared to the typical J(c)(H) of YBCO, resulting in higher irreversibility fields up to 9 T at 77 K. SEM observation on etched samples suggests a direct link between the defect density measured in YBCO-BZO samples and that calculated from the observed in field performances. The analysis of J(c)(B) as a function of applied magnetic field direction revealed that the pinning due to isotropic pinning centers typical for YBCO is coupled with a c-axis correlated pinning in YBCO-BZO which can be ascribed to BZO induced columnar defects. J(c)(B) recorded at several temperatures down to 10 K revealed matching effect features.

Details

ISSN :
15582515 and 10518223
Volume :
19
Database :
OpenAIRE
Journal :
IEEE Transactions on Applied Superconductivity
Accession number :
edsair.doi.dedup.....73919c2b357e59f27a005a4068303052
Full Text :
https://doi.org/10.1109/tasc.2009.2019253