Levitation forces of a single-grained Y-Ba-Cu-O bulk superconductor of 48 mm in diameter

✍ Scribed by H. Teshima; M. Sawamura; M. Morita; M. Tsuchimoto

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 586 KB
• Volume: 37
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(97)00084-2

✦ Synopsis

This paper describes the numerical and experimental superconducting levitation forces of a single-grained Y-Ba-Cu-0 bulk superconductor of approximately 48 mm in diameter. The experimental levitation forces were measured by changing the magnet radius systematically. It was found experimentally that the levitation force shows a maximum when the magnet radius is slightly smaller than the superconductor radius. Comparison of the experimental and numerical levitation forces showed that even large bulk superconductors have a macroscopic value of J, as high as 2.0 x IO4 A cm-*, not much different from the microscopic value of ./,.