Single-Grain Bulk YBa2Cu3Oy Superconductor Grown in Shorter Duration by IG Process

Abstract

The top-seeded infiltration growth (IG) process is considered to be an attractive, well-established route compared to melt growth (MG) process due to its successful ability to resolve observed problems in MG process such as pores, shrinkage, and an ununiformed Y2BaCuO5 (Y-211) secondary phase particle dispersion in Y-123 matrix. This is among the first accounts of superconductivity where a large grain YBa2Cu3Oy (Y-123) was produced by IG process. Further, by utilizing homemade Y-123 and Y-211, we had prepared YBa2Cu3Oy samples via Y-123 + liquid (1:1) as a liquid source and had further characterized by utilizing the scanning electron microscopy (SEM), superconducting transition temperature (Tc), and critical current density (Jc) at 77 K. Here, we provide temperature dependence of magnetization measurements that indicated a sharp superconducting transition with Tc (onset) around 92 K. In addition, the critical current density was calculated on the basis of Bean’s model and resulted as 30,000 A/cm2 at 77 K (self-field), H//c-axis. Trapped field experiments had lucidly indicated that single-grain nature with maximum-trapped field of 0.3 T at 77 K and 1 mm above sample surface even samples are produced shorter duration, i.e., 50 h.