Thin-film based ultralow noise SQUID magnetometer

M. Schmelz , V. Zakosarenko , A. Chwala , T. Sch\"onau , R. Stolz , S. Anders , S. Linzen , H.-G. Meyer

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classification ⚛️ physics.ins-det cond-mat.supr-con

keywords noisesquidthin-filmcoilmagnetometerultralowapplicationcapacitance

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We report on the development of an ultralow noise thin-film based SQUID magnetometer. A niobium thin-film pickup coil is connected to the input coil of a SQUID current sensor. The low capacitance of the used sub-micrometer cross-type Josephson junctions enable superior noise performance of the device. Application scenarios e.g. in geophysics and ultra-low field magnetic resonance imaging are discussed.

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Thin-film based ultralow noise SQUID magnetometer

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