@article{Zhang1993tempe-10161,
  year={1993},
  doi={10.1088/0967-3334/14/2/002},
  title={High temperature RF SQUIDs for biomedical applications},
  number={2},
  volume={14},
  journal={Physiological Measurement},
  pages={113--119},
  author={Zhang, Yi and Tavrin, Yuri and Mück-Weymann, Michael and Braginski, Alex I. and Heiden, Christoph and Elbert, Thomas and Hampson, Sarah}
}

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    <dcterms:issued>1993</dcterms:issued>
    <dc:contributor>Zhang, Yi</dc:contributor>
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    <dc:creator>Braginski, Alex I.</dc:creator>
    <dcterms:bibliographicCitation>First publ. in: Physiological Measurement 14 (1993), 2, pp. 113-119</dcterms:bibliographicCitation>
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    <dc:creator>Heiden, Christoph</dc:creator>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-25T09:14:40Z</dc:date>
    <dc:creator>Zhang, Yi</dc:creator>
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    <dc:contributor>Heiden, Christoph</dc:contributor>
    <dcterms:abstract xml:lang="eng">The authors have been investigating the feasibility of radio-frequency RF, low-noise superconducting quantum interference device (SQUID) magnetometers and gradiometers operating in liquid nitrogen at 77 K. Using flux-focusing structures fabricated from epitaxial YBa2Cu3O7-x films, they have attained a magnetic field resolution for a magnetometer of better than 200 fT Hz-1/2 at less than 1 Hz, i.e. over the low signal-frequency range important for biomedical diagnostics. At 77 K, this magnetometer recorded diagnostically useful heart signals, voluntary eye-blink signals and also the first evoked response of a human brain. These and similar results were obtained in a magnetically shielded room. The authors were also able to record heart signals in the absence of any shielding when using a first-order gradiometer. An improvement in the magnetic field resolution of the magnetometers and gradiometers by, at least, another order of magnitude is possible and probable.</dcterms:abstract>
    <dc:contributor>Braginski, Alex I.</dc:contributor>
    <dc:creator>Mück-Weymann, Michael</dc:creator>
    <dc:contributor>Elbert, Thomas</dc:contributor>
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