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Coatings 2017, 7(5), 62; doi:10.3390/coatings7050062

An All Sol-Gel Process for the Heteroepitaxial Growth of YBa2Cu3O7−x/LaNiO3/YBa2Cu3O7−x Tri-layer

Department of Materials Physics and Chemistry, Xi’an University of Technology, Xi’an 710048, China
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Academic Editor: Maria J. Mosquera
Received: 29 March 2017 / Revised: 18 April 2017 / Accepted: 24 April 2017 / Published: 28 April 2017
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Abstract

The preparation of a YBa2Cu3O7−x/LaNiO3/YBa2Cu3O7−x sandwich structured film on a LaAlO3 (100) substrate by a sol-gel method was investigated. YBa2Cu3O7−x/LaNiO3/YBa2Cu3O7−x tri-layer heterostructures with different epitaxial characteristics can be deposited by controlling the heat treatment temperature. X-ray diffraction and transmission electron microscopy results show that the bottom YBCO film grows epitaxially on the LaAlO3 substrate along the c axis, and that this epitaxial growth trend is extended to the subsequently deposited LaNiO3 film. For this reason, the LaNiO3 film also grows epitaxially along the c axis. Furthermore, this epitaxial growth trend is extended to the top YBa2Cu3O7−x film, yielding YBa2Cu3O7−x/LaNiO3/YBa2Cu3O7−x tri-layer heterostructures with epitaxial growth characteristics along the c axis, which enables both the bottom and top YBa2Cu3O7−x layers to possess superconducting abilities. View Full-Text
Keywords: sol-gel; HRTEM; superconductor; heteroepitaxy; tri-layer sol-gel; HRTEM; superconductor; heteroepitaxy; tri-layer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wu, C.; Zhao, G.; Fang, P.; Wang, S.; Zhang, Y. An All Sol-Gel Process for the Heteroepitaxial Growth of YBa2Cu3O7−x/LaNiO3/YBa2Cu3O7−x Tri-layer. Coatings 2017, 7, 62.

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