[19p-B403-1~12] 11.3 Critical Current, Superconducting Power Applications

△ [19p-B403-4] Flux Pinning Properties at High Field and Low Temperature in SmBa₂Cu₃O_y Superconducting Bicrystalline Films

〇Yuji Tsuchiya¹, Junya Akita¹, Yusuke Ichino¹, Tatsunori Okada², Satoshi Awaji², Yutaka Yoshida¹ (1.Nagoya Univ., 2.Tohoku Univ.)

Keywords:high temperature superconductor, critical current, bicrystal

Critical current density J_c extremely decreases in REBCO high temperature superconducting films for grain boudaries with large angles. Recent application requires the REBCO tapes used at low temperature and high magnetic fields. However, the inter-grain Jc property is still unclear for the operation condictions. In this study, SmBCO films were fabricated on single-crystalline or bicrystalline substrates with various tilt angle. Infield Jc properties were measured at temperatures from 4.2 K to 77 K and field up to 24 T to clarify flux pinning properties in REBCO films with grain boundaries.