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- Title
Film thermal stability correlation with seeding modes in the growth of YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7−δ</sub> crystals.
- Authors
Xiang, Hui; Wang, Wei; Li, Hao-Chen; Cui, Xiang-Xiang; Fan, Wen-Shuo; Guo, Lin-Shan; Yao, Xin; Zou, Zhi-Qiang; Xiong, Jie
- Abstract
High-quality and large YBa2Cu3O7−δ (YBCO or Y123) single crystals are necessary for both fundamental studies and practical applications. The recently exploited modified melt growth (MMG) procedure realizes a high efficiency of growth and high purity of Y123. However, it was unexpectedly found that the thermal stability of the NdBa2Cu3O7−δ (Nd123) film seed applied in MMG is greatly reduced owing to a change in the liquid property. In order to solve this problem, a new top-seeding mode, buried seeding, is developed to strengthen the film thermal stability, leading to a remarkable enhancement of endurable maximum processing temperature of over 30 K in low supersaturation. Furthermore, the correlation of the thermal stability of the film seed in melt growth with the liquid property and top-seeding modes is clarified. Most importantly, the buried-seeding mode was successfully applied in this work, opening a promising pathway for the effective growth of single crystals of other REBCO (RE = Nd, Sm, Gd) oxides (possessing a higher peritectic temperature than YBCO), as well as other functional oxides.
- Subjects
YTTRIUM barium copper oxide films; THERMAL stability; CRYSTALS; PERITECTIC reactions; WETTING
- Publication
Journal of Applied Crystallography, 2016, Vol 49, Issue 3, p873
- ISSN
0021-8898
- Publication type
Article
- DOI
10.1107/S1600576716005355