Superheating property of REBa2Cu3O7-x thin film and its,applications in seeding growth of REBa2Cu3O7-x superconductors
Mardi 17 mars 2015 10:30
- Duree : 1 heure
Lieu : LNCMI, salle de conférences "René Pauthenet" (bâtiment J, 2ème étage) - 25 rue des martyrs - 38000 Grenoble
Orateur : Xin YAO (Shanghai Jiao Tong University)
Recently, we reported a superheating phenomenon of REBCO (RE=Nd, Sm, Y) thin films, e.g. the complete decomposition of a c-oriented YBCO film occurs at a temperature of 50 K higher than its peritectic temperature (Tp). The origins and influential factors of superheating property were investigated, involving film oriented structures, substrate materials, and phase diagram natures.
On the other hand, for fundamental study and practical application, the seeding growth of REBCO superconductors has been conducted in our lab by Top-Seeded Solution-Growth, Top-Seeded Melt-Growth, and Liquid Phase Epitaxy. Making full use of their unique superheating property, we employed REBCO films as universal seed materials to induce the growth of 1) high-performance & high Tp REBCO crystals, such as NdBCO and SmBCO, 2) large-sized crystals, 3) recycling failed bulks.
Contact : xavier.chaud@lncmi.cnrs.fr
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