[17a-W9_323-1~7] 11.3 Critical Current, Superconducting Power Applications

9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)

[17a-W9_323-1] Microstructure and critical current properties of K-doped BaFe₂As₂ polycrystalline bulks via two-step spark plasma sintering

〇Goro Kitano¹, Shota Ishiwata¹, Ichiro Mizuto¹, Nur Ayukaryana¹, Akiyasu Yamamoto¹ (1.Tokyo Univ. of Agri. and Tech.)

Keywords:

Ba122,two-step spark plasma sintering,critical current

BaFe₂As₂ (Ba122), an iron-based superconductor, offers high critical temperature and field, promising for high-field magnets. In polycrystalline, however, critical current is limited due to chemical composition, microstructure and grain boundary weak links. In this study, K doped Ba122 polycrystalline bulks are fabricated via two-step spark plasma sintering, evaluating pressure effects on microstructure and critical current properties. The presentation will also discuss the difference in flux pinning behavior between one-step SPS samples and two-step SPS samples.