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A DC SQUID consists of a superconducting loop that has two Josephson junctions. ... This circuit uses the same noise reduction techniques as the position sensor: a common mode rejection transformer, the low-pass filter, and a high-precision low-noise voltage reference IC. ... is further confirmed by observing ageing effects through the dc zero-field-cooled magnetization and the thermoremanent magnetization time decays, and by the analysis of the frequency dependence of Tf using ...doi:10.20381/ruor-19931 fatcat:po7aqvzmvrc5zc2khdhtt6pshm