[13a-B407-1~11] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

[13a-B407-11] Microstructure and physical properties of grain aligned RE123 polycrystalline bulks prepared by magneto-scientific method at low temperature

〇Yujin Saito¹, Masato Kondo¹, Yasuaki Takeda², Takanori Motoki¹, Jun-ichi Shimoyama¹ (1.Aoyama Gakuin Univ., 2.The Univ. of Tokyo)

Keywords:high-Tc cuprate superconductor, magnetic alignment

REBa₂Cu₃O_y(RE123) superconductors exhibit high critical temperature (T_c) and high critical current density (J_c) under magnetic fields. However, randomly grain oriented RE123 polycrystalline bulks show low J_c due to the weak link of grain boundary. Therefore, we fabricated c-axis grain aligned RE123 sintered bulks by a simple magnetic grain orientation technique using permanent magnets and EtOH. The c-axis aligned bulks showed approximately 1.5 times higher intergrain J_c than that of the randomly oriented bulks.