Single crystallinity and oxygen diffusion in high-quality YBa2Cu3O7-delta films

Zi Liang Wu; M. Z. Wei; Yi-Xin Chen; Cong Xin Ren; Jihong Zhang

doi:10.1117/12.47338

1 November 1991 Single crystallinity and oxygen diffusion in high-quality YBa₂Cu₃O_7-δ films

Zi Liang Wu, M. Z. Wei, Yi-Xin Chen, Cong Xin Ren, Jihong Zhang

Proceedings Volume 1519, International Conference on Thin Film Physics and Applications; (1991) https://doi.org/10.1117/12.47338
Event: International Conference on Thin Film Physics and Applications, 1991, Shanghai, China

Abstract

High quality epitaxial YBa₂Cu₃O_7-(delta) films prepared by d.c. magnetron sputtering are single crystalline containing mosaic blocks, the boundaries of which consist of arrays of dislocations piling up into walls. Low temperature oxygenation in the orthorhombic phase is carried out by pipe diffusion in the basal planes. An equation has been derived from the dislocation model of low angle tilting grain boundary which predicts a linear relationship between the oxygen increase 1-(delta) and t^3/4, where t is the diffusion time. Two straight lines were established for oxygen anneal respectively at 300 degree(s)C and 350 degree(s)C and these verified the proposed model explicitly. From slops of these two straight lines, an activation energy of 1.18 eV for lattice diffusion of oxygen is obtained.

Citation Download Citation

Zi Liang Wu, M. Z. Wei, Yi-Xin Chen, Cong Xin Ren, and Jihong Zhang "Single crystallinity and oxygen diffusion in high-quality YBa₂Cu₃O_7-δ films", Proc. SPIE 1519, International Conference on Thin Film Physics and Applications, (1 November 1991); https://doi.org/10.1117/12.47338

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