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Giant relaxation oscillations in a very strongly hysteretic SQUID ring-tank circuit system
journal contributionposted on 2023-06-08, 06:54 authored by T D Clark, Robert PranceRobert Prance, R Whiteman, H Prance, M J Everitt, A R Bulsara, J F Ralph
In this article, we show that the radio frequency (rf) dynamical characteristics of a very strongly hysteretic superconducting quantum interference device (SQUID) ring, coupled to a rf tank circuit resonator, display relaxation oscillations. We demonstrate that the overall form of these characteristics, together with the relaxation oscillations, can be modeled accurately by solving the quasiclassical nonlinear equations of motion for the system. We suggest that in these very strongly hysteretic regimes, SQUID ring-resonator systems may find application in logic and memory devices. © 2001 American Institute of Physics.
JournalJournal of Applied Physics
Department affiliated with
- Engineering and Design Publications
NotesDescribes the first observation of a strongly non linear region of behaviour in a hysteretic SQUID ring, coupled to a radio frequency tank circuit resonator. Relaxation oscillations and phase portraits are shown and modelled accurately by solving the quasi-classical non linear equations of motion for the system. This is a combined experiment and theory paper. My contribution was to design the experiment and develop the techniques required to allow highly non linear behaviour to become observable in these systems. The work on SQUIDs contributed to a successful application for £200k SRIF funding of an ultra-low temperature facility at Sussex.
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