[15p-W9_325-1~12] 11.1 Fundamental properties

1:30 PM - 1:45 PM JST(4:30 AM - 4:45 AM UTC)

[15p-W9_325-1] Control of Cation Stoichiometry in Y123 Melt-Textured Bulks Grown by SDMG Method

〇Ryo Asako¹, Takanori Motoki¹, Jun Endo¹, Keita Kunimoto¹, Naoya Matsunaga¹, Masafumi Kunii¹, Jun-ichi Shimoyama¹ (1.Aoyama Gakuin Univ.)

Keywords:

Superconductivity,Bulk superconducting magnets,Single-Direction Melt Growth

RE123 melt-textured bulks exhibit high critical current density (J_c) under high magnetic fields, and their extensive application is expected as strong superconducting magnets. Ca-doping to the rare-earth site, which introduces hole carriers, is anticipated to improve the critical current properties within the bulk crystal and across grain boundaries as well as to enhance the field-trapping characteristics at middle to low temperature (20 – 60 K). However, precise control of Ca doping levels is required, which stems from the fact that Ca-doping to RE123 also accompanies a decrease in critical temperature (T_c) and induces local lattice distortions. This presentation will explain superconducting properties of Ca-doped and (Ca,Sr) co-doped Y123 melt-textured bulks grown by the Single-Direction Melt Growth (SDMG) method.