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The Structural Evolution of (\hbox {Gd}, \hbox {Y}) \hbox {Ba}_{2}\hbox {Cu}_{3}\hbox {O}_{\rm x} Tapes With Zr Addition Made by Metal Organic Chemical Vapor Deposition

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10 Author(s)
Changhui Lei ; SuperPower Inc., Schenectady, NY, USA ; Galstyan, E. ; Yimin Chen ; Tuo Shi
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Structural analysis of (Gd, Y)Ba2Cu3Ox tapes with Zr addition made by metal organic chemical vapor deposition has been conducted with transmission electron microscopy and X-ray diffraction. Zr content in the films was varied from 0 to 25% in the precursor. In all Zr-doped films, self-assembled nanocolumnar structures of BaZrO3 (BZO) were observed along the c-axis. The amount of BaZrO3 was found to increase steadily with Zr content. Additionally, planar BZO plates were found on the (001) plane of (Gd, Y)Ba2 Cu3Ox film. The size and thickness of BZO plates were seen to increase with Zr doping level. Rare-earth copper oxide phases were observed to begin to emerge in the 20 % Zr-doped film. Cross-sectional study of the interface between (Gd, Y)Ba2Cu3Ox and LaMnO3 cap layer revealed a thin discrete BZO layer on the LaMnO3 in the 20 % Zr doped film.

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Applied Superconductivity, IEEE Transactions on  (Volume:23 ,  Issue: 3 )