Magnetic levitation over a superconductor

1. Magnetic Levitation Over a Superconductor

4. Evolution of superconducting materials with time Element / Compound T c Al 1 K Pb 7 K Nb 9 K Nb-Ti 9 K Nb 3 Sn 18 K Nb 3 Ge 23 K La-Sr-Cu-O 38 K Y-Ba-Cu-O 92 K Bi-Sr-Ca-Cu-O 110 K Tl-Ba-Ca-Cu-O 125 K Hg-Ba-Ca-Cu-O 165 K

10. Melt Processed Nd-123 Excess Nd-422 precipitates - cause interfacial defects and aid flux pinning V. Seshu Bai et al. Eur. Phys. J. B 4 , 55 (1998)

12. Nb 3 Sn Wire Fabrication Cu Ta-40wt%Nb Nb-1wt%Ti Sn-2wt%Mg

13. Shape Forming with high Jc IG processed Y- 123 cylinder Microwave Cavities Magnetic shields

16. Magnetically Levitated Trains December 24,1997 Achieved world speed record for unmanned train 550km/h December 12,1997 Achieved world speed record for manned train 531km/h

17. Levitation Force on a magnet : Present experiment 1.Superconductor used : YBa 2 Cu 3 O 7-  … .. called (Y-123 compound) Melt-processed with extra Y 2 BaCuO 5 called (Y- 211 compound) T c = 92 K 2. Magnet used A permanent magnet SmCo 5 weighing ~ 8 gram