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Thin-film dc SQUID gradiometer using a single YBa2Cu3O7−x layer (1994)

Zakosarenko, V. ; Schmidl, F. ; Schneidewind, H. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 65 (1994), S. 779-780

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: A dc SQUID gradiometer with a large effective pickup area using only a single YBa2Cu3O7−x layer and step-edge Josephson junctions on SrTiO3 substrate has been prepared. The planar gradiometer consists of two loops coupled directly to a small area SQUID in the center of the structure. The main advantage in comparison to magnetometers is the possibility of direct measurements in a magnetically unshielded environment. At 77 K without bias reversal technique we obtain a white noise level of about 4.5×10−5 Φ0 Hz−1/2 or 8×10−13 T cm−1 Hz−1/2 down to 10 Hz. At 1 Hz noise increases up to 6×10−12 T cm−1 Hz−1/2.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.112228

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