SUPERCONDUCTING PROPERTIES OF MELT-TEXTURED ND1-XCU3OY PREPARED IN AIR(XBA2)

High T-c melt-textured Nd1+xBa2-xCu3Oy bulk samples have been prepared through a newly developed melt process in air. Some important superco nducting properties of melt-textured Nd1+xBa2-xCu3Oy are measured. The critical temperature of the obtained sample was 93 K. The trapped mag netic field mapping shows that the diameter of a single domain can rea ch 1 cm. The critical current density J(c) values are 2.4 x 10(4) A/cm (2) in 0 T at 77 K and 1.7 x 10(4) A/cm(2) in 1 T at 77 K. No pronounc ed fishtail effect is observed in the hysteresis (M-H) loop. The maxim um trapped magnetic field of a single domain consisting of two grains is 101 mT. These results show that the new melt process is comparable with the previously reported processes of melt-textured Nd1+xBa2-xCu3O y. (C) 1997 Elsevier Science B.V.