Sub-THz dielectric resonance in single crystal yttrium iron garnet and magnetic field tuning of the modes

Popov, M. A.; Zavislyak, I. V.; Srinivasan, G.

doi:10.1063/1.3607873

Cited by 29 publications

(24 citation statements)

References 23 publications

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“…Although the theory [12] predicts degenerate modes for H = 0, zero-field splitting is observed in Fig. 2 due to the presence of large domains [12]. With an increase in H, one notices an up-shift in the frequency of one mode and a down-shift in the other.…”

Section: Experimental Set-upmentioning

confidence: 94%

“…It could be a consequence of differences in the domain structures [12,27,28]; domains in BaM are much smaller and after spatial averaging its zero-field highfrequency properties more resemble a pure dielectric. Such splitting may be considered as an advantage, since it creates low-loss operating region between resonances without applied field and, thus, decreases minimum required magnetic field.…”

Section: Discussionmentioning

confidence: 99%

“…The modes correspond to clockwise and counter-clockwise polarization of the microwave fields [9][10][11][12]. Although the theory [12] predicts degenerate modes for H = 0, zero-field splitting is observed in Fig. 2 due to the presence of large domains [12].…”

Section: Experimental Set-upmentioning

confidence: 97%

“…Theoretical models that consider electromagnetic modes in axially magnetized cylindrical ferrite resonators [9][10][11][12], predict that modes with nonzero azimuthal index, e.g., E +11δ and E −11δ , excited by clockwise and counterclockwise microwave fields are degenerate for H = 0. However, this degeneracy is removed in a bias field and their frequencies become H dependent due to change in static permeability.…”

Section: Theoretical Model and Calculationsmentioning

confidence: 99%

See 3 more Smart Citations

A Magnetic Field Tunable Yttrium Iron Garnet Millimeter-Wave Dielectric Phase Shifter: Theory and Experiment

Popov¹,

Zavislyak²,

Srinivasan³

2012

PIER C

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Abstract-A magnetically tunable passive narrow-band split-mode mm-wave phase shifter based on dielectric resonance in yttrium iron garnet (YIG) is investigated. The novelty here is the demonstration of a phase shifter in the frequency region between two split dielectric resonances in YIG. It is shown that, under certain conditions, the differential phase shift from the split modes add up, resulting in a larger phase shift than for a single mode phase shifter. Two prototype phase shifters operating in the U-and W-bands at frequencies much higher than ferromagnetic resonance (FMR) in YIG have been designed and characterized. Phase shifts up to 30 • with low losses and acceptable standing wave ratio are obtained for moderate bias magnetic fields. Equivalent transmission-line model taking into account coupling between the split resonances is presented and there is reasonable agreement between theory and experiment for both insertion loss and differential phase shift. Suggestions on further improvements of prototype filter characteristics have been outlined.

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Section: Experimental Set-upmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Experimental Set-upmentioning

confidence: 97%

Section: Theoretical Model and Calculationsmentioning

confidence: 99%

See 2 more Smart Citations

A Magnetic Field Tunable Yttrium Iron Garnet Millimeter-Wave Dielectric Phase Shifter: Theory and Experiment

Popov¹,

Zavislyak²,

Srinivasan³

2012

PIER C

View full text Add to dashboard Cite

show abstract

“…Thus, before we proceed to the discussion of the main results of our work, we would like to additionally highlight the novelty of our results with respect to those presented in previous works: 1) Previous works Refs. [20,[42][43][44][45][46][47][48][49][50][51] demonstrated the existence of spinelectromagnetic waves in multilayered structures consisting of a YIG film combined with a ferroelectric or piezoelectric materials. In such structures, a spin-electromagnetic wave results from anti-crossing interaction between a spin wave in the YIG film and an electromagnetic wave propagating mostly in the electrically controlled layer.…”

Section: Introductionmentioning

confidence: 99%

Rigorous numerical study of strong microwave photon-magnon coupling in all-dielectric magnetic multilayers

Maksymov

Hutomo

Nam

et al. 2015

Journal of Applied Physics

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Abstract:We demonstrate theoretically a strong local enhancement of the intensity of the in-plane microwave magnetic field in multilayered structures made from a magneto-insulating yttrium iron garnet (YIG) layer sandwiched between two non-magnetic layers with a high dielectric constant matching that of YIG. The enhancement is predicted for the excitation regime when the microwave magnetic field is induced inside the multilayer by the transducer of a stripline Broadband Ferromagnetic Resonance (BFMR) setup. By means of a rigorous numerical solution of the Landau-Lifshitz-Gilbert equation consistently with the Maxwell's equations, we investigate the magnetisation dynamics in the multilayer. We reveal a strong photon-magnon coupling, which manifests itself as anti-crossing of the ferromagnetic resonance (FMR) magnon mode supported by the YIG layer and the electromagnetic resonance mode supported by the whole multilayered structure. The frequency of the magnon mode depends on the external static magnetic field, which in our case is applied tangentially to the multilayer in the direction perpendicular to the microwave magnetic field induced by the stripline of the BFMR setup. The frequency of the electromagnetic mode is independent of the static magnetic field. Consequently, the predicted photon-magnon coupling is sensitive to the applied magnetic field and thus can be used in magnetically tuneable metamaterials based on simultaneously negative permittivity and permeability achievable thanks to the YIG layer. We also suggest that the predicted photon-magnon coupling may find applications in microwave quantum information systems.

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Dielectric resonance in nickel ferrite for K and Ka-band filters

Popov

Zavislyak

Murthy

et al. 2014

Microw. Opt. Technol. Lett.

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The nature of dielectric resonance and its utility for a magnetic field tunable band‐pass filter have been studied in a polycrystalline disk of nickel ferrite. The lowest order dielectric resonance manifests as two modes corresponding to clockwise and counter‐clockwise polarization of the microwave fields. Under the influence of a static magnetic field perpendicular to the disk plane, one of the modes show a decrease in frequency whereas the other shows an increase in frequency. With increasing H, the frequency separation increases. Band‐pass filters for operation at 19, 30, and 35 GHz have been designed and characterized. The filter central frequency has been controlled with proper choice of disk dimensions. The filter frequency is tuned with H, by 2–7%. As the filter frequency is well above the ferromagnetic resonance frequency expected for the static magnetic fields, the overall losses are small with the insertion loss ranging from 2 to 5 dB. Theoretical estimates of H‐tuning of dielectric resonance and pass‐band are much higher than measured values, indicative of potential for further improvement in filter performance. The ferrite filters are of importance for use in the K and Ka‐band communication devices. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:814–818, 2014

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Sub-THz dielectric resonance in single crystal yttrium iron garnet and magnetic field tuning of the modes

Cited by 29 publications

References 23 publications

A Magnetic Field Tunable Yttrium Iron Garnet Millimeter-Wave Dielectric Phase Shifter: Theory and Experiment

A Magnetic Field Tunable Yttrium Iron Garnet Millimeter-Wave Dielectric Phase Shifter: Theory and Experiment

Rigorous numerical study of strong microwave photon-magnon coupling in all-dielectric magnetic multilayers

Dielectric resonance in nickel ferrite for K and Ka-band filters

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