Reduction of the noise level in mutual inductive magnetic sensors with a magnetic circuit differential

Journal of Magnetism and Magnetic Materials（2022）

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Abstract

•A new method to reduce MIMS noise level, magnetic circuit differential, is proposed.•Common-mode magnetic noise is eliminated by MCD without sacrificing sensitivity.•Noise level of MIMS with MCD is only 10% of that of the conventional MIMS.•Detection limit of MIMS with MCD can reach 10-2 pT, which has a significant potential.

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Key words

Common-mode magnetic noise,Detection ability,Magnetic circuit differential,Magnetization fluctuation,Mutual inductive magnetic sensor

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