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Noise properties of high-T-c superconducting flux transformers fabricated using chemical-mechanical polishing

Chukharkin Leonidovich, Maxim, 1980 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Kalaboukhov, Alexei, 1975 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Schneiderman, Justin, 1979 (author)
Chalmers tekniska högskola,Chalmers University of Technology
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Öisjöen, Fredrik, 1982 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Snigirev, O. (author)
M. V. Lomonosov Moscow State University
Lai, Zonghe, 1948 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Winkler, Dag, 1957 (author)
Chalmers tekniska högskola,Chalmers University of Technology
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Chalmers tekniska högskola M V. Lomonosov Moscow State University (creator_code:org_t)
AIP Publishing, 2012
2012
English.
In: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 101:4, s. Article Number: 042602 -
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Reproducible high-temperature superconducting multilayer flux transformers were fabricated using chemical mechanical polishing. The measured magnetic field noise of the flip-chip magnetometer based on one such flux transformer with a 9 x 9 mm(2) pickup loop coupled to a bicrystal dc SQUID was 15 fT/Hz(1/2) above 2 kHz. We present an investigation of excess 1/f noise observed at low frequencies and its relationship with the microstructure of the interlayer connections within the flux transformer. The developed high-T-c SQUID magnetometers may be advantageous in ultra-low field magnetic resonance imaging and, with improved low frequency noise, magnetoencephalography applications.

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Keyword

magnetometers
magnetic-resonance
gradiometers
yba2cu3o7-x
josephson-junctions
planarization
brain
device

Publication and Content Type

art (subject category)
ref (subject category)

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