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Theoretical Calculation of Magnetic Force for Type-II Superconductor in a Levitated Magnetic Field
並列摘要
The hysteretic force behavior of a type-II superconductor in cylindrical geometry is theoretically analyzed for applied an inhomogeneous magnetic field parallel to the long axis of the superconductor. The assumption of a simple inverse proportionality between the critical current density and magnetic induction B allows a theoretical calculation of the magnetization of irreversible type-II superconductors. The dependence of levitation forces on the sample size, external field strength, field gradient and physical properties of superconducting specimen were investigated. Various dynamic parameters, including magnetic stiffness, and natural frequency were inferred from the minor loop calculations for superconductors in a field of constant gradient. The minor loops could be described as quadratic rule of the Rayleigh loop in the limit of small oscillation.
並列關鍵字
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