[19a-PB2-1~36] 11 Superconductivity (Poster)

△ [19a-PB2-26] Local Characteristic of Ag Sheath (Ba, K)Fe₂As₂ Tape Fabricated by Hot-press Process Based on In-field Magnetic Microscopy

〇Zeyu Wu¹, Samuel Warren², Kohei Higashikawa¹, Huang He³, Chao Yao³, Yanwei Ma³, Takanobu Kiss¹ (1.Kyushu Univ., 2.Yale Univ., 3.CAS)

Keywords:iron-based superconductors, magnetic microscopy, local Jc distribution

We investigated the spatial distribution of local critical currents in an Ag-sheathed (Ba, K)Fe₂As₂ (Ba-122) tapes fabricated by improved hot-press process,based on In-field magnetic microscopy.Compared with the Ba-122 sample fabricated by the previous hot-press process,this sample owns better homogeneity,and higher in-field critical current I_c.Besides,we will show more detail about the comparison about the longitudinal distribution of the critical current I_c,and the magnetic field dependence.