Melting behavior and superheating capacity of REBa2 Cu3 O y films with nano-layer buffered structures
| Autor: | Yisha Zhu, Ghulam Hussain, Zhang Letian, Andrey R. Kaul, S.V. Samoilenkov, Hui Xiang, Xin Yao, Wang Wei, Dejing Yu |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Thermal decomposition 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Buffer (optical fiber) Surface energy Superheating Crystallinity Crystallography Chemical bond Chemical engineering 0103 physical sciences Nano Materials Chemistry Ceramics and Composites Thin film 010306 general physics 0210 nano-technology |
| Zdroj: | Journal of the American Ceramic Society. 101:1704-1710 |
| ISSN: | 0002-7820 |
| Popis: | Using high temperature-optical microscopy, in situ investigations were conducted on melting and superheating behaviors of REBa2Cu3O7−δ (RE123, RE = Nd, Gd) films, which were grown on nano-layer buffered substrates. The results demonstrate that all buffered RE123 films have improved crystallinity and in-plane alignments, leading to the higher superheating capability. In the first case, due to its good lattice match with the buffer material of Y123, the Nd123 film with the minimal extrinsic property grew from the superior interface. In the second circumstance, because of its stronger chemical bonding with the buffer layer of Gd2O3, the pure c-axis oriented Gd123 film was fabricated. Moreover, the optimized thickness of buffer layer plays an important role in reducing interface energy of RE123 films and enhancing its superheating capacity. |
| Databáze: | OpenAIRE |
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