Abstract Using C programming language, we have simulated the flux creep process in nonideal type-Ⅱ superconductors. Global and local magnetization curves are calculated and the logarithmic time dependence of local magnetic induction B under a constant external field is examined. The effects of nonuniform pinning potential and self-organized criticality (SOC) model on the simulations are discussed. The results show that the main feature of flux creep is the relaxation effect. The form of hysteresis loops is dependent on the magnetic field sweep rate. SOC can account for the occurrence of fluctuation to a certain extent and nonuniform pinning potential can enhance the fluctuation.
Received: 03 August 1999
Revised: 09 September 1999
Accepted manuscript online:
(Magnetization curves, hysteresis, Barkhausen and related effects)
Fund: Project supported by the National Center for Research & Development on Superconductivity of China.
Cite this article:
Nie Hui-fen (聂惠芬), Liu Yu-feng (刘宇峰), Huang Yi-mei (黄奕梅), Yan Shou-sheng (阎守胜) SIMULATION ON LOCAL FLUX CREEP IN TYPE-Ⅱ SUPERCONDUCTORS 2000 Chinese Physics 9 141
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