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

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 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.

Large Size and High Performance of a Gd–Ba–Cu–O Bulk Superconductor Grown Using New Approaches

“…The temperature range for the single domain growth, and further restrain the self‐nucleation can be broadened by raising T max . In the previous work, YBCO bulk grown using a YBCO thin film with a superheating effect as a seed has been reported 17 . Because of the similar structures among the REBCO compound family, the use of a superheating film as a seed can be extended for other REBCO systems.…”

Multiseeded melt growth of bulk Y–Ba–Cu–O using thin film seeds

“…In previous reports, YBCO/MgO thin films with high thermal stability 4 have been demonstrated to act successfully as seeds for the growth of bulk YBCO. 12 The many desirable properties of YBCO thin films such as superheating, the induction of homo-epitaxial growth and their ability to be cleaved with a precise orientation makes them potentially suitable to overcome the major limitations of the multi-seeding process.…”

Peritectic melting of thin films, superheating and applications in growth of REBCO superconductors

“…Using an Y123/MgO thin film as a homo-seed, a success in cold-seeding melt-growth of a c-axis oriented YBCO bulk was reported for the first time [106]. Fig.…”