Thermal instability in a ferrimagnetic resonator strongly coupled to a loop-gap microwave cavity

• URL: http://arxiv.org/abs/2105.06102v2
• Date: Fri, 6 Aug 2021 08:54:07 GMT
• Title: Thermal instability in a ferrimagnetic resonator strongly coupled to a loop-gap microwave cavity
• Authors: Cijy Mathai, Oleg Shtempluck and Eyal Buks
• Abstract summary: We study a ferrimagnetic sphere resonator (FSR) strongly coupled to a microwave loop gap resonator (LGR) The measured response in the regime of weak nonlinearity allows the extraction of the FSR Kerr coefficient and its cubic damping rate. We find that there is a certain range of driving parameters in which the system exhibits instability.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We study nonlinear response of a ferrimagnetic sphere resonator (FSR) strongly coupled to a microwave loop gap resonator (LGR). The measured response in the regime of weak nonlinearity allows the extraction of the FSR Kerr coefficient and its cubic damping rate. We find that there is a certain range of driving parameters in which the system exhibits instability. In that range, self-sustained modulation of the reflected power off the system is generated. The instability is attributed to absorption-induced heating of the FSR above its Curie temperature.

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