[15p-4A-1~17] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

[15p-4A-4] Minimization of BaHfO₃ flux pinning centers in YBa₂Cu₃O_y films by TFA-MOD method

〇Ryo Teranishi¹, Hiroshi Horita¹, Kazuhiro Yamada¹, Kenji Kaneko¹, Teruo Izumi² (1.Kyushu Univ., 2.SRL-ISTEC)

Keywords:superconductor,YBCO films growth,Flux pinning centers

YBCO films with BaHfO₃ (BHO) as flux pinning centers were grown by MOD method using TFA salts and the effect of additional heating process on size of BHO particles was investigated. Two samples were fabricated with and without the additional heating process. The mean size of BHO particle in YBCO with and in YBCO without were measured about 15 nm and about 19 nm, respectively. Also, it was recognized clearly that the size distribution of BHO particles became small in the case of the sample with additional heating process.