Effects of the self-magnetic fields in relaxation oscillation SQUIDs

Jun A. Kawai; G. Uehara; Hisashi Kado

doi:10.1117/12.180998

2 July 1994 Effects of the self-magnetic fields in relaxation oscillation SQUIDs

Jun A. Kawai, G. Uehara, Hisashi Kado

Proceedings Volume 2160, Superconductive Devices and Circuits; (1994) https://doi.org/10.1117/12.180998
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

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.

Citation Download Citation

Jun A. Kawai, G. Uehara, and Hisashi Kado "Effects of the self-magnetic fields in relaxation oscillation SQUIDs", Proc. SPIE 2160, Superconductive Devices and Circuits, (2 July 1994); https://doi.org/10.1117/12.180998

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