Abstract
Magnetic noise sources associated with flux hopping processing due to weak flux pinning in high temperature superconductors were investigated. Ignoring the complex details of collective vortex motion, we provide an explanation for the temperature and magnetic field dependence of the noise spectral power. It was found that the effect of the magnetic field is to minimize the temperature gradient of the critical current density, therefore reducing the noise spectral power at applied field values between 0.5 T and 1.5 T. For fields greater than 4.5 T a slow increase in the noise power is predicted.
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