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PVD growth and characterization of YBCO thin films on polycrystalline alumina substrates: phase separation
Date
2000-11-01
Author
Ozenbas, MA
Gungoren, T
Metadata
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In this study, high T-c superconducting thin films of Y-Ba-Cu-O system have been prepared onto polycrystalline alpha -Al2O3 substrates by resistive evaporation of YF3, BaF2, and Cu powders and a subsequent multi-stage annealing. In the deposition process, two different methods were used: mixed-powder method and sequential-deposition method. The best quality films were achieved on alpha -Al2O3 substrates by using sequential-deposition technique with offset critical transition temperature of 80.6 K. Sequential deposition method seems to reduce film-substrate reactions on alpha -Al2O3 substrates, probably due in part to the prevention of phase separation.
Subject Keywords
Electrical and Electronic Engineering
,
Energy Engineering and Power Technology
,
Electronic, Optical and Magnetic Materials
,
Condensed Matter Physics
URI
https://hdl.handle.net/11511/65420
Journal
PHYSICA C
DOI
https://doi.org/10.1016/s0921-4534(00)01256-9
Collections
Department of Metallurgical and Materials Engineering, Article