Electromagnetic Properties of Y_1.5Ba₂Cu₃O_7-y Ceramic Oxide Bulk

In the present study, the process of crystal growth from an interior seed was employed to compensate for the shortcomings of the conventional process of crystal growth. Upon completion of the formation of the upper part of the YBCO bulk and the lower part of the pellet, a YBCO superconductor was fabricated by a thermal treatment process. The seed was put vertically or horizontally onto the c -axis of the YBCO. Magnetic levitation of the seed placed horizontally on the specimen appeared, with higher magnetic levitation of the seed placed vertically on the specimen. Measurements of the trapped magnetism showed an identical trend. The temperature of the superconductor was lowered to the temperature of liquid nitrogen (77 K) through the method of zero-field cooling to observe changes in the resulting magnetic levitation. Depending upon the amount of Ag added, magnetic levitation rendered various measurements of 76.12 N, 70.523 N, and 57.711 N. The magnetism trapped inside the superconductive crystal was measured through field cooling, from which a surface magnetism of 2.23 kG of the superconductive bulk specimen appeared.