Abstract
Based on recent mesurements we present a theoretical analysis of voltage noise as function of both temperature and magnetic field. Nonlinearity of noise power in applied magnetic field can be caused by the many-body dynamics effect of vortex. Thus vortex motions may be highly correlated, suggesting that in the flux creep region such many-body dynamics effect can cause the observed (1/f) β noise power spectrum, by showing a maximum with the highest applied magnetic field at a critical temperature and a possibility of self-organized criticality.
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