[20p-B202-1~16] 11.1 Fundamental properties

2:30 PM - 2:45 PM JST(5:30 AM - 5:45 AM UTC)

[20p-B202-5] Attempts to increase the size of entirely a-grown RE123 melt-textured bulks.

〇Mirei Semba¹, Takanori Motoki¹, Keita Kunimoto¹, Jun Endo¹, Jun-ichi Shimoyama¹ (1.Aoyama Gakuin Univ.)

Keywords:

superconductor,crystal growth,RE123 melt-textured bulks

We have recently developed the Single-Direction Melt Growth (SDMG) method where bulks grow only vertical direction from a large seed plate cut from commercial TSMG bulks. Using SDMG, bulks consist of an arbitrary crystal growth direction such as [001], [100], and [110] depending on the crystallographic surface orientation of the seed plate, and homogeneous bulks can be grown with high reproducibility. Hence, entirely a-grown bulks, which very few studies have been conducted thus far, can be obtained by SDMG. In this study, we have investigated superconducting properties and microstructures of the entirely a-grown Dy123 melt-textured bulks in detail as well as entirely c-grown bulks as a comparison. It was found that entirely a-grown bulks exhibited superior crystallinity and critical current properties compared to those of entirely c-grown bulks, which is clearly deferent from a- and c-growth regions of conventional top-seeded bulks. Including trapped field distributions of both entirely a- and c-grown bulks, potentials of a-grown bulks will be discussed.