GROWTH OF YBA2CU3O7 CEO2/AL2O3 HETEROEPITAXIAL FILMS BY AEROSOL MOCVD/

Authors
FROHLICH K MACHAJDIK D VAVRA I SOUC J ROSOVA A FIGUERAS A WEISS F DAHMEN KH
Citation
K. Frohlich et al., GROWTH OF YBA2CU3O7 CEO2/AL2O3 HETEROEPITAXIAL FILMS BY AEROSOL MOCVD/, Journal of alloys and compounds, 251(1-2), 1997, pp. 284-287
Citations number
6
Categorie Soggetti
Chemistry Physical","Metallurgy & Metallurigical Engineering","Material Science
Journal title
Journal of alloys and compounds → ACNP
ISSN journal
09258388
Volume
251
Issue
1-2
Year of publication
1997
Pages
284 - 287
Database
ISI
SICI code
0925-8388(1997)251:1-2<284:GOYCHF>2.0.ZU;2-H
Abstract
We have prepared YBa2Cu3O7 thin superconducting films on (1102)Al2O3 s ubstrate with CeO2 buffer layer using an aerosol MOCVD process. Textur e analysis using X-ray diffraction showed a high degree of epitaxial c haracter of both YBa2Cu3O7 and CeO2 films. Study of the microstructure of the YBa2Cu3O7 layer and YBa2Cu3O7/CeO2 and CeO2/Al2O3 interfaces b y transmission electron microscopy revealed relaxation of the CeO2 and YBa2Cu3O7 layers. The films exhibited a critical temperature T-c(R=0) =84-88 K, resistivity at room temperature of 600 mu Omega cm, a resist ivity ratio rho((300K))/rho((100K)) higher than 3 and critical current density up to 3x10(9) A cm(-2) at T=77 K.