Abstract:The primary low-frequency noise in superconducting quantum interference devices (SQUIDs) at low temperature is flux noise with a power spectral density of the form with . Experiments show this noise is due to independent clusters of interacting spins at the metal-insulator interface of the Josephson junction. The temperature dependences of the amplitude and the spectral exponent α are such that the noise spectra of devices taken at different temperatures cross each other at a common crossing frequency fc, so… Show more
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