Magnetic Levitation Forces of Superconductors
The magnetic levitation force (F) of a superconductor is dependent on its manufacturing process and the specification of a magnet used for the measurement. The F of the melt processed superconductors is very large. For example, the F of the single-grain bulk superconductors measured at liquid nitrogen temperature (77 K) is as large as a hundred newton (N), depending on the dimension of a permanent magnet. The weight of several tons can be levitated using the superconductors and magnets. This chapter present the method of the measurement of the magnetic levitation force of superconductors at 77 K and the magnetic field trapped in the superconductors. The magnetization process of superconductors using the mixed state of a Type 2 superconductor is described.
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