YBCO melt-textured growth seeded by superheating YBCO/MgO thin film

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Abstract:

Using YBCO/MgO thin films, for the first time, we report a success in the melt-textured growth of YBCO bulks by the cold-seeding method. The grown bulk has a good orientation relation of &{\mathrm {YBCO}}\langle 100\rangle_{\mathrm {bulk}} \parallel {\mathrm {YBCO}} \langle 100 \rangle_{\mathrm {film}}\parallel {\mathrm {MgO}} \langle 100 \rangle_{\mathrm {substrate}} ;. In this process, the YBCO film withstood heating over its peritectic temperature (up to 1045 °C) for 1.5h and acted as a seed for the YBCO bulk growth, indicating an intrinsic superheating property, which was reported in other work. The unique superheating mechanism in this study was clarified. It was found that the ab alignment of YBCO film plays a key role in controlling the single grain growth of YBCO bulk.

Document Type: Research Article

DOI: http://dx.doi.org/10.1088/0953-2048/18/6/L02

Publication date: June 1, 2005

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