2 July 1994 Effects of the self-magnetic fields in relaxation oscillation SQUIDs
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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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jun A. Kawai, G. Uehara, Hisashi Kado, "Effects of the self-magnetic fields in relaxation oscillation SQUIDs", Proc. SPIE 2160, Superconductive Devices and Circuits, (2 July 1994); doi: 10.1117/12.180998; https://doi.org/10.1117/12.180998
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