Alternating current loss in a cylinder with power-law current-voltage characteristic

Chen, D.-X.; Gu, C.
June 2005
Applied Physics Letters;6/20/2005, Vol. 86 Issue 25, p252504
Academic Journal
The transport ac loss Q in a superconducting cylinder of radius awitha power-law current-voltage characteristic E=Ec|J/Jc|n as a function of current amplitude Im is numerically calculated for a set of given values of a, Jc, and frequency f at n=5, 10, 20, and 30. After deriving a scaling law and defining a critical frequency fc, the results can be converted and interpolated to those for any values of a, Jc, f, and 5≤=n≤=30. The “power-law” Q(Im) at f=fc is a better alternative of the critical-state Q(Im), used not only for describing the features of Q(Im,f) of high-temperature superconductors but also for planning Q measurements and their interpretation


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