[16p-D209-1~14] 11.1 Fundamental properties

[16p-D209-7] Development of crystal orientation analysis for grain boundary structure in Ba-122 bulk

〇Yusuke Shimada¹, Yuta Hasegawa², Shinnosuke Tokuta², Koki Muraoka³, Takuto Kojima⁴, Zimeng Guo³, Satoshi Hata³, Hiroaki Kudo⁴, Noritaka Usami⁵, Akiyasu Yamamoto² (1.IMR Tohoku Univ., 2.TUAT, 3.IGSES Kyushu Univ., 4.GSI Nagoya Univ., 5.GES Nagoya Univ.)

Keywords:Polycrystalline superconductor, Grain baundary, Electron microscopy

The microstructure of superconducting materials is known to have a significant influence on the critical current properties.We have developed a microstructural analysis method specifically for polycrystalline superconducting bulk materials, which has a wide range of applications. In this study, we have developed and introduced a novel grain boundary analysis method to obtain the correlation between Jc and grain boundary structure in high-density Ba-122 polycrystalline superconductors.As a result, we succeeded in extracting unique grain boundary structural parameters using nanoscale crystal orientation measurment method and visualization of grain boundary networks analysis.