Interaction of magnetostatic waves with a current

Emtage, P. R.

doi:10.1063/1.325452

Cited by 102 publications

(36 citation statements)

References 6 publications

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“…This may give, in particular, a foundation for well-known theories of the MS-wave excitation by an electric current (see e.g. [17,18]). Based on this expression, Boardman et al [19] considered the power-flow-density rotation excited by three planar antennas to analyze possible vortex structures of MS waves in a ferrite film.…”

Section: Energy Relations For Mdms In a Normally Magnetized Ferrite Diskmentioning

confidence: 99%

Vortices and chirality of magnetostatic modes in quasi-2D ferrite disc particles

Kamenetskii¹

2007

J. Phys. A: Math. Theor.

189

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In this paper we show that the vortex states can be created not only in magnetically soft "small" (with the dipolar and exchange energy competition) cylindrical dots, but also in magnetically saturated "big" (when the exchange is neglected) cylindrical dots. A property associated with a vortex structure becomes evident from an analysis of confinement phenomena of magnetic oscillations in a ferrite disk with a dominating role of magnetic-dipolar (non-exchangeinteraction) spectra. In this case the scalar (magnetostatic-potential) wave functions may have a phase singularity in a center of a dot. A non-zero azimuth component of the flow velocity demonstrates the vortex structure. The vortices are guaranteed by the chiral edge states of magnetic-dipolar modes in a quasi-2D ferrite disk.

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Section: Energy Relations For Mdms In a Normally Magnetized Ferrite Diskmentioning

confidence: 99%

Vortices and chirality of magnetostatic modes in quasi-2D ferrite disc particles

Kamenetskii¹

2007

J. Phys. A: Math. Theor.

189

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“…As we discussed above, the electromagnetic-wave approach gives a basis for the theories of the MSwave excitation by an electric current [32,33]. It could be supposed also that in known experiments of excitation of ferrite samples by external RF magnetic fields [15,16], the electromagnetic-wave approach is applicable for the main (large-wavelength) oscillating MS modes.…”

Section: Excitation Problemsmentioning

confidence: 99%

Handedness of magnetic-dipolar modes in ferrite disks

Kamenetskii

2006

Journal of Magnetism and Magnetic Materials

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AbsractFor magnetic-dipolar modes in a ferrite, components of the magnetic flux density in a helical coordinate system are dependent on both an orientation of a gyration vector and a sign of a pitch. It gives four types of helical harmonics for magnetostatic-potential wave functions in a ferrite disk. Because of the reflection symmetry breaking, coupling between certain types of helical harmonics takes place in the reflection points. The reflection feature leads to exhibition of two types of resonances: the "right" and "left" resonances. These resonances become coupled for a ferrite disk placed in a homogeneous tangential RF magnetic field. One also observes such resonance coupling for a ferrite disk with a symmetrically oriented linear surface electrode, when this ferrite particle is placed in a homogeneous tangential RF electric field. In a cylindrical coordinate system handedness of magnetic-dipolar modes in a ferrite disk is described by spinor wave functions.

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“…(1-5) we can significantly simplify the problem. This is because the microstrip has a infinitely small thickness in the y-direction and hence can be treated as a boundary condition involving the surface current density [19,22,16,17]. The surface current and its distribution along x are assumed to be given.…”

Section: Theorymentioning

confidence: 99%

“…It takes a couple of more seconds to convert the obtained Z r values into S21 by using Eqs. (18)(19)(20)(21)(22)(23)(24)(25) from [16].…”

Section: Theorymentioning

confidence: 99%

Theoretical Study of the Stripline Ferromagnetic Resonance Response of Metallic Ferromagnetic Films Based on an Analytical Model

Hai

Kostylev

2016

SPIN

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Abstract:We develop an advanced analytical model for calculating the broadband stripline ferromagnetic resonance (FMR) response for metallic ferromagnetic films, taking into account the exchange interaction as well as the exchange boundary conditions at the film surface. This approach leads to simple analytical expressions in the Fourier space. As a result, a numerical code which implements inverse Fourier transform of these equations is very quick. This allows us to explore a wide space of parameters as numerical examples of application of this theory. In particular, we investigate the joint effect of microwave eddy current shielding and magnetisation pinning at the ferromagnetic film surfaces on the shape of the stripline FMR response of the film.

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Interaction of magnetostatic waves with a current

Cited by 102 publications

References 6 publications

Vortices and chirality of magnetostatic modes in quasi-2D ferrite disc particles

Vortices and chirality of magnetostatic modes in quasi-2D ferrite disc particles

Handedness of magnetic-dipolar modes in ferrite disks

Theoretical Study of the Stripline Ferromagnetic Resonance Response of Metallic Ferromagnetic Films Based on an Analytical Model

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