[16p-318-1~16] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

△ [16p-318-4] Introduction of Sm₂BaCuO₅ as Artificial Pinning Centers into SmBa₂Cu₃O_y Coated Conductors Fabricated in Vapor-Liquid-Solid Growth Mode

〇Shuya Tajiri¹, Yusuke Ichino¹, Yuji Tsuchiya¹, Yutaka Yoshida¹ (1.Nagoya Univ.)

Keywords:superconductivity, REBCO coated conductor, Vapor-Liquid-Solid growth

Vapor-Liquid-Solid (VLS) growth mode is a liquid-assisted vapor phase epitaxy. This mode can provides high quality REBa₂Cu₃Oy (RE123) films at a high rate. However, it is difficult to introduce artificial pinning centers (APCs) into RE123 films in this mode because BaMO₃ (M=Metal), the representative material for APC, is insoluble into the Ba-Cu-O liquid phase. In this study, Sm₂BaCuO₅ (Sm211) was introduced into Sm123 films in the VLS mode as an APC because of their solubility in the liquid phase. Those films had a better in-field properties compared with pure Sm123 films grown in the same mode. The result indicates that Sm211 acts as the APCs in the Sm123 matrix.