Unloaded Q of Single Crystal Yttrium-Iron-Garnet Resonator as a Function of Frequency (Correspondence)

Carter, P.S.; Flammer, C.

doi:10.1109/tmtt.1960.1124792

Cited by 11 publications

(1 citation statement)

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“…5b, for typical samples having Oe and R 1 = 0.25 mm, the maximum of the unloaded Q is ca. 6000 at H 0 r ≈ 2.5, which agrees well with experimental results available in the body of literature 7, 9 . It is noteworthy that, theoretically, the Q -factor of shielded samples linearly increases with H 0 , as has been confirmed numerically 26 .…”

Section: Introductionsupporting

confidence: 90%

Ferromagnetic Resonance Revised – Electrodynamic Approach

Křupka

Aleshkevych

Salski

et al. 2017

Sci Rep

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Resonance in a ferromagnetic sphere, known in the body of literature as the mode of uniform precession, has recently been proven to be magnetic plasmon resonance (MPR). This finding has prompted research which is presented in this paper on the relation between the Q-factor at the MPR and the ferromagnetic resonance (FMR) linewidth ΔH, which is a parameter of magnetized gyromagnetic materials. It is proven in this paper that ΔH can be unequivocally determined from the Q-factor measured at the MPR, if all losses in the resonance system are properly accounted for. It can be undertaken through a rigorous but simple electrodynamic study involving the transcendental equation, as proposed in this paper. The present study also reveals that electric losses have a substantially reduced impact on ΔH due to the large magnetic to electric energy storage ratio at the MPR. Theoretical results are supported by measurements of the Q-factors on a monocrystalline yttrium iron garnet (YIG) sphere.

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Section: Introductionsupporting

confidence: 90%