[9p-Z27-1~24] 11.1 Fundamental properties

[9p-Z27-1] Development of homogeneous REBCO melt-textured bulks with selective grain-growth regions

〇Takanori Motoki¹, Yu Yanai¹, Kota Nunokawa¹, Rempei Sasada¹, Jun-ichi Shimoyama¹ (1.Aoyama Gakuin Univ.)

Keywords:REBCO, melt-textured bulk, Trapped field

To achieve the biaxial oriented growth of REBCO, texturization using a seed crystal, such as in top-seeded melt growth (TSMG) or top-seeded infiltration growth (TSIG) methods, has been adopted, resulting in generations of a-growth and c-growth regions. Pronounced differences in microstructures and J_c properties have been reported between a-growth and c-growth regions. In this study, we aimed to fabricate high-performance REBCO melt-textured bulks completely composed of selective grain growth regions (i.e., whole c-grown bulks), using a new simple method focusing on the difference of peritectic temperatures of REBCOs with different rare earth elements, which is referred to as single-direction melt growth (SDMG) method.