Presentation Information
[10p-A31-7]Changes in heat treatment step of non-superconducting structure of multifilamented YBCO films by Substrate-Encoded Filamentation
〇Ryo Teranishi1, Hiroki Fujimoto1, Taiki Wada1, Akiyoshi Matsumoto2, Masayoshi Inoue3, Yusuke Sogabe4, Takumi Ikenoue4 (1.Kyushu Univ., 2.NIMS, 3.FIT, 4.Kyoto Univ.)
Keywords:
Superconductor,YBCO,Multifilament
To reduce AC losses in REBCO-coated-conductors, we proposed a "Substrate-Encoded Filamentation method" using metal stripes. In this study, we investigated the formation process of the non-superconducting region. Microstructural changes during crystallization heat treatment were observed using SEM. The microstructure directly above the stripe, which was approximately 4.7 μm before crystallization, expanded to approximately 6.0 μm after heat treatment, indicating that the non-superconducting region expanded in the width direction. Furthermore, the change in surface morphology suggested that the reaction products on the stripe changed during the heat treatment process.