[16p-W9_325-1~10] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

3:30 PM - 3:45 PM JST(6:30 AM - 6:45 AM UTC)

[16p-W9_325-8] Control of low level RE/Ba substitution in Y123 thin films prepared by FF-MOD method

〇Naoki Hata¹, Kazutoyo Sagara¹, Takanori Motoki¹, Jun-ichi Shimoyama¹, Yoshihara Tatsuhiko², Genki Honda², Shinichi Kobayashi² (1.Aoyama Gakuin Univ., 2.Sumitomo Electric Inst.)

Keywords:

superconductivity,Y123,YBCO

Although the FF-MOD method is suitable for mass production, the high crystallinity of the films results in a low density of effective flux pinning centers and consequently a low critical current density under magnetic fields. Partial RE/Ba substitution can enhance J_c by introducing point defect like pinning centers. In this study, Y123 thin films partially substituted with light rare earth elements were fabricated, and the RE/Ba substitution level was controlled by adjusting the nominal RE composition and by adding a post-annealing process at 500 - 600 °C, aiming to improve the critical current properties.