Frequency mixing in a ferrimagnetic sphere resonator

TL;DR

This paper investigates nonlinear frequency mixing in ferrimagnetic yttrium and calcium vanadium iron garnet resonators, revealing insights into their interactions and potential for high-gain signal receivers in RF and microwave bands.

Contribution

It demonstrates experimental and theoretical analysis of frequency mixing in ferrimagnetic resonators, including models and bifurcation studies, advancing their application in sensitive signal detection.

Findings

Validated Landau-Zener-Stuckelberg model predictions

Observed bifurcation between stable attractors

Enhanced understanding of nonlinear interactions in ferrimagnetic resonators

Abstract

Frequency mixing in ferrimagnetic resonators based on yttrium and calcium vanadium iron garnets (YIG and CVBIG) is employed for studying their nonlinear interactions. The ferrimagnetic Kittel mode is driven by applying a pump tone at a frequency close to resonance. We explore two nonlinear frequency mixing configurations. In the first one, mixing between a transverse pump tone and an added longitudinal weak signal is explored, and the experimental results are compared with the predictions of the Landau-Zener-Stuckelberg model. In the second one, intermodulation measurements are employed by mixing pump and signal tones both in the transverse direction for studying a bifurcation between a stable spiral and a stable node attractors. Our results are applicable for developing sensitive signal receivers with high gain for both the radio frequency and the microwave bands.