[23a-D215-1~10] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

[23a-D215-7] Control of cation composition of Bi2223 tapes for high field applications

〇Yoshinobu Miyamoto¹, Takanori Motoki¹, Soichiro Takeda², Takayoshi Nakashima², Satoru Yamade², Jun-ichi Shimoyama¹ (1.Aoyama Gakuin Univ., 2.Sumitomo Electric Industries, Ltd.)

Keywords:superconductor, Bi

(Bi,Pb)₂Sr₂Ca₂Cu₃O_y [Bi2223] tape, which has practical high critical current properties for a wide range of applications, has been mass-produced as DI-BSCCO^®. However, due to the intrinsically large electromagnetic anisotropy of Bi2223, its J_c at high temperatures and in magnetic fields is lower than that of RE123 material. On the other hand, the policy of increasing Pb substitution for the Bi sites with reduction of electromagnetic anisotropy is effective for reducing this issue. The purpose of this study is to develop Bi2223 tapes that show excellent critical current properties even in high magnetic fields.