Magnetostatic volume waves in exchange-coupled ferrite films

Vysotskiǐ, S. L.; Kazakov, G. T.; Filimonov, Yu. A.; Maryakhin, A. V.

doi:10.1134/1.1259081

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…However, to validate which form of the exchange field is proper one and which describe properly the real physical system is out of scope of this paper. In the literature various boundary conditions were used, for example, [6][7][8][9][10][11][12][13][14], but the discussion under possibility for implementing them in effective continuous models is only at the beginning stage, and further investigation is required.…”

Section: Boundary Conditionsmentioning

confidence: 99%

“…On the interface between two ferromagnetic materials, the boundary conditions (BCs) on dynamical component of the magnetization vector should be imposed. Such boundary conditions were proposed by Hoffman, then developed, and investigated by other authors [6][7][8][9][10][11][12][13][14]. From the LL equation together with the set of BCs, the spin-wave (SW) dispersion and profiles can be calculated.…”

Section: Introductionmentioning

confidence: 99%

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On the Formulation of the Exchange Field in the Landau-Lifshitz Equation for Spin-Wave Calculation in Magnonic Crystals

Krawczyk

Sokolovskyy

Kłos

et al. 2012

Advances in Condensed Matter Physics

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The calculation of the magnonic spectra using the plane-wave method has limitations, the origin of which lies in the formulation of the effective magnetic field term in the equation of motion (the Landau-Lifshitz equation) for composite media. According to ideas of the plane-wave method the system dynamics is described in terms of plane waves (a superposition of a number of plane waves), which are continuous functions and propagate throughout the medium. Since in magnonic crystals the sought-for superposition of plane waves represents the dynamic magnetization, the magnetic boundary conditions on the interfaces between constituent materials should be inherent in the Landau-Lifshitz equations. In this paper we present the derivation of the two expressions for the exchange field known from the literature. We start from the Heisenberg model and use a linear approximation and take into account the spacial dependence of saturation magnetization and exchange constant present in magnetic composites. We discuss the magnetic boundary conditions included in the presented formulations of the exchange field and elucidate their effect on spin-wave modes and their spectra in one- and two-dimensional planar magnonic crystals from plane-wave calculations.

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Section: Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the Formulation of the Exchange Field in the Landau-Lifshitz Equation for Spin-Wave Calculation in Magnonic Crystals

Krawczyk

Sokolovskyy

Kłos

et al. 2012

Advances in Condensed Matter Physics

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Giant sensitivity to magnetic field variation in the spin wave interferometer based on the system of exchange-coupled films of yttrium iron garnet

Vysotskiǐ

Kozhevnikov

Balinskiy

et al. 2022

Journal of Applied Physics

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In this work, we present experimental data on the interference of backward volume magnetostatic wave (BVMSW) counter-propagating in the structure with two exchange-coupled yttrium iron garnet layers. The layers are engineered to have different saturation magnetization that gives a possibility to BVMSW resonantly interacting with exchange modes of the two-layer structure. The BVMSW is excited by two antennas placed on top of the structure, while the third one placed between them is used for the detection of inductive voltage V generated by waves superposition. It is shown that maximal changes of the output inductive signal δV with the variation of magnetic field δH occur if, first, the waves interfere destructively and, second, the frequency corresponds to the resonant interaction of BVMSW with the exchange waves. In this case, obtained data reveal large sensitivity S = δV/δH approaching S ≈ 267 dB/Oe in the vicinity ±0.1 Oe of the resonant field H. The observed high sensitivity is of great importance for the development of compact sensitive magnetometers operating at room temperature.

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Neighboring-Metallic-Layer-Induced Nonreciprocal Wave Propagation in a Thin Metallic Ferromagnetic Film

Brockdorf

Vishal

Zhuang

2016

IEEE Trans. Compon., Packag. Manufact. Technol.

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Magnetostatic volume waves in exchange-coupled ferrite films

Cited by 6 publications

References 10 publications

On the Formulation of the Exchange Field in the Landau-Lifshitz Equation for Spin-Wave Calculation in Magnonic Crystals

On the Formulation of the Exchange Field in the Landau-Lifshitz Equation for Spin-Wave Calculation in Magnonic Crystals

Giant sensitivity to magnetic field variation in the spin wave interferometer based on the system of exchange-coupled films of yttrium iron garnet

Neighboring-Metallic-Layer-Induced Nonreciprocal Wave Propagation in a Thin Metallic Ferromagnetic Film

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