Coupling Electromagnetic Waves to Spin Waves: A Physics-Based Nonlinear Circuit Model for Frequency-Selective Limiters

Cui, Han; Yao, Zhi; Wang, Yuanxun Ethan

doi:10.1109/tmtt.2019.2918517

Cited by 29 publications

(16 citation statements)

References 17 publications

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“…The ideal radiator with thin-film YIG is simulated in HFSS. The equivalent circuit model for this ideal radiator is structured by importing the RLC tank for spin motion [35]. Radiating power calculated through the physics model, the full-wave simulation and the circuit model are compared to validate the accuracy of the physics model and the spin-motion circuit model in characterizing ferrite antenna parameters.…”

Section: Strategies and Structures Of The Studymentioning

confidence: 99%

“…In [35], a physics-based equivalent circuit model for the spin motion of electrons inside thin-film ferrites was developed, which was then applied successfully to model the response of frequency-selective limiters.…”

Section: Circuit Models For Thin-film Ferrites and The Ideal Radiatormentioning

confidence: 99%

“…After determine the structure of the equivalent circuit model, we relate the expression of the input impedance of the RLC circuit block to Kittel's equation and solve for , and , we have: The value for each element in the circuit model for this ideal radiator is shown in TABLE I. As mentioned in [35], a single RLC resonator has its limitation to represent all properties of thinfilm ferrites, only those with uniform precessions. Factors, which include exchange coupling between spins, non-uniform field distributions in antenna structures, infinite volume and so on, can alter the values of , and .…”

Section: Circuit Models For Thin-film Ferrites and The Ideal Radiatormentioning

confidence: 99%

See 2 more Smart Citations

Ferromagnetic Resonance-Enhanced Electrically Small Antennas

Luong

Yao

et al. 2021

IEEE Trans. Antennas Propagat.

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Section: Strategies and Structures Of The Studymentioning

confidence: 99%

Section: Circuit Models For Thin-film Ferrites and The Ideal Radiatormentioning

confidence: 99%

Section: Circuit Models For Thin-film Ferrites and The Ideal Radiatormentioning

confidence: 99%

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Ferromagnetic Resonance-Enhanced Electrically Small Antennas

Luong

Yao

et al. 2021

IEEE Trans. Antennas Propagat.

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“…This ability to precisely select a particular magnon pair is important for spintronic devices, where better control of magnon production means better conveyance of information, and thus better processing speeds and capacity. It also may benefit the accuracy and the efficiency of parametrized nonlinear circuit models [37], [38], where simple models of scattering are used to approximate device functions. The magnons are approximated by equivalent circuit units, such as resistances, inductors and capacitors.…”

Section: Magnon Pair At the Power Thresholdmentioning

confidence: 99%

Nonlinear Magnon Scattering Mechanism for Microwave Pumping in Magnetic Films

Venugopal

Etheridge

et al. 2020

IEEE Access

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Magnon scattering enables non-linear microwave devices, such as frequency selective limiters and signal to noise enhancers. It may also impact information transfer within spintronic devices. Here, a quantitative understanding of magnon processes in thin films is developed using micromagnetic simulations, in combination with newly developed analytic theory and experimental data. A technique for calculating the number of magnons at each frequency and wavevector as a function of external input such as power and frequency is identified. It is shown that, near the nonlinear threshold, the dominant parametrically excited magnon pairs are those with minimal group velocity and the correct energy. These results complement Brillouin Light Scattering experiments and indicate a path for wavevector-modulated magnon production based only on simulated results and/or analytic theory, a desirable goal for information transfer and communication.

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“…While these numerical methods are promising for analyzing transducers in the magnetostatic regime, there is a void of tools focused on the exchange regime. As an alternative way to design exchange-based transducers, one can modify the Polder susceptibility tensor to include the exchange interaction 21,22,26 , thereby extending the theoretical expressions for radiation impedance into the exchange regime. This has several benefits: it allows for rapid design iteration, it preserves the intuitive insight provided by closed-form expressions, and it eliminates the requirement to mesh at increasingly fine spatial scales compared to electromagnetic (EM) wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Efficient Electromagnetic Transducers For Spin-Wave Devices

Connelly

Csaba

Aquino

et al. 2021

Preprint

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This paper presents a system-level efficiency analysis, a rapid design methodology, and a numerical demonstration of efficient sub-micron, spin-wave transducers in a microwave system. Applications such as Boolean spintronics, analog spin-wave-computing, and magnetic microwave circuits are expected to benefit from this analysis and design approach. These applications have the potential to provide a low-power, magnetic paradigm alternative to modern electronic systems, but they have been stymied by a limited understanding of the microwave, system-level design for spin-wave circuits. This paper proposes an end-to-end microwave/spin-wave system model that permits the use of classical microwave network analysis and matching theory towards analyzing and designing efficient transduction systems. This paper further compares magnetostatic-wave transducer theory to electromagnetic simulations and finds close agreement, indicating that the theory, despite simplifying assumptions, is useful for rapid yet accurate transducer design. It further suggests that the theory, when modified to include the exchange interaction, will also be useful to rapidly and accurately design transducers launching magnons at exchange wavelengths. Comparisons are made between microstrip and co-planar waveguide lines, which are expedient, narrowband, and low-efficiency transducers, and grating and meander lines that are capable of high-efficiency and wideband performance. The paper concludes that efficient microwave-to-spin-wave transducers are possible and presents a meander transducer design on YIG capable of launching λ=500nm spin waves with an efficiency of -4.45 dB and a 3 dB-bandwidth of 134 MHz.

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Coupling Electromagnetic Waves to Spin Waves: A Physics-Based Nonlinear Circuit Model for Frequency-Selective Limiters

Cited by 29 publications

References 17 publications

Ferromagnetic Resonance-Enhanced Electrically Small Antennas

Ferromagnetic Resonance-Enhanced Electrically Small Antennas

Nonlinear Magnon Scattering Mechanism for Microwave Pumping in Magnetic Films

Efficient Electromagnetic Transducers For Spin-Wave Devices

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