With low‐noise magnetometers made from high‐temperature superconductors, mobile applications of superconducting quantum interference device (SQUID) magnetometry become possible. Due to the high volume heat of evaporation of liquid nitrogen, a SQUID magnetometer can be operated in a small size cryostat for some hours. For the first time biomagnetic measurements are presented using an integrated YBa2Cu3O7 magnetometer mounted in a hand‐held cryostat with a content of 100 cm3 of liquid nitrogen. These measurements and the noise properties are compared to those made in a conventional cryostat. The low‐noise magnetometer consists of a multiloop pick‐up coil coupled inductively to a dc SQUID based on ramp‐type Josephson junctions with PrBa2Cu3O7 barriers.
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28 October 1996
Research Article|
October 28 1996
Biomagnetic measurements with an integrated YBa2Cu3O7 magnetometer in a hand‐held cryostat Available to Purchase
M. Schilling;
M. Schilling
Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstra\Se 11, 20355 Hamburg, Germany
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S. Krey;
S. Krey
Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstra\Se 11, 20355 Hamburg, Germany
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R. Scharnweber
R. Scharnweber
Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstra\Se 11, 20355 Hamburg, Germany
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M. Schilling
Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstra\Se 11, 20355 Hamburg, Germany
S. Krey
Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstra\Se 11, 20355 Hamburg, Germany
R. Scharnweber
Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstra\Se 11, 20355 Hamburg, Germany
Appl. Phys. Lett. 69, 2749–2751 (1996)
Article history
Received:
July 23 1996
Accepted:
August 21 1996
Citation
M. Schilling, S. Krey, R. Scharnweber; Biomagnetic measurements with an integrated YBa2Cu3O7 magnetometer in a hand‐held cryostat. Appl. Phys. Lett. 28 October 1996; 69 (18): 2749–2751. https://doi.org/10.1063/1.117699
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