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Proceedings Paper

Effects of the self-magnetic fields in relaxation oscillation SQUIDs
Author(s): Jun A. Kawai; G. Uehara; Hisashi Kado
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Paper Abstract

In a Relaxation Oscillation SQUID (ROS), the magnetic fields (Self-Magnetic Fields, i.e. SMF) generated by the current in the shunt circuit coupled to the SQUID loop. It has been proven that SMF caused asymmetry and a shift of the magnetic flux-frequency ((Phi) -f) characteristics and the frequency fluctuation. The calculated results of the (Phi) -f curve taking account of the SMF are in good agreement with the experiment results. The asymmetric $PHI-f curve provides a larger df/d(Phi) , which leads to the good flux resolution. While the frequency fluctuation, which is observed as the broad spectrum, increases in proportion to the transfer coefficient (df/d(Phi) ). The SMF depends on the mutual inductance between the shunt inductance and the SQUID loop.

Paper Details

Date Published: 2 July 1994
PDF: 9 pages
Proc. SPIE 2160, Superconductive Devices and Circuits, (2 July 1994); doi: 10.1117/12.180998
Show Author Affiliations
Jun A. Kawai, Superconducting Sensor Lab. (Japan)
G. Uehara, Superconducting Sensor Lab. (Japan)
Hisashi Kado, Electrotechnical Lab. (Japan)

Published in SPIE Proceedings Vol. 2160:
Superconductive Devices and Circuits
Robert A. Buhrman; John T. Clarke; Ken Daly; Roger H. Koch; Jerome A. Luine; Randy W. Simon, Editor(s)

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