Effects of the platelet structures on the melt textured growth YBCO superconductors

Hong, Inki; Hwang, Ho Jung; Han, Yung-Hee; Han, Sang-Chul; Sung, Tae–Hyun; No, Kwangsoo

doi:10.1109/tasc.2003.812131

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“…There are three main categories of seeds: (1) non-superconducting materials, such as MgO, etc [1,2]; (2) bulk superconductors, i.e. RE123 single crystal or melt-textured (MT) bulk [3][4][5]; (3) RE123 thin or thick films [6,7]. Non-superconductors may cause contamination in the bulks.…”

Section: Introductionmentioning

confidence: 99%

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

Tang¹,

Yao

Hu³

et al. 2005

Supercond. Sci. Technol.

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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 YBCO 100 bulk YBCO 100 film MgO 100 substrate . In this process, the YBCO film withstood heating over its peritectic temperature (up to 1045 • C) for 1.5 h 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 a-b alignment of YBCO film plays a key role in controlling the single grain growth of YBCO bulk.

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