Characteristics of magnetostatic surface waves propagating in thin metal film coated ferrimagnetic layered structure

Okamura, Yasuyuki; Kitatani, Kazuhiro; Yamamoto, Sumio

doi:10.1109/20.281185

Cited by 4 publications

(7 citation statements)

References 5 publications

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“…Initially we checked the characteristics of the MSSW propagating in the structure for the whole frequency region considered. "here appeared two branches according to the value of the conductivity for the +z-direction of propagation: branch 1 is in the frequency range from 2.6GHz to 3.16Hz at the small conductivity and the branch 2 is in the region from 2.6GHz to 4.1GHz for the large conductivity [4]. However, no significant drfference in the dispersion characteristics was apparent for thez-direction of Propagation.…”

Section: Numerical Resultsmentioning

confidence: 73%

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Characteristics of magneto-static surface wave propagating in layered ferrimagnetic structure with a slightly absorptive superstrate

1995

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The paper describes the theoretical and experimental stud,y on the magneto-static surface wave (MSSW) propagating in a layered ferrimagnetic structure, onto which a slightly lossy material such as an electrolyte is covered. We focused on the propagation characteristics of the MSSW; especially, the attenuation of the MSSW, due to the cover material's conductivity. With the complete electromagnetic theory, the dispersion characteristics of the MSSW was derived. The theoretical ainalysis was compared with the preliminary experiment using the sodium chloride dissolved in water as a superstrate, the result of which was in a good agreement. This indicates the application of the considered structure to the electrolyte densitoimeter using the fact that the conductivity is in proportion to the content of the electrolyte.

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Section: Numerical Resultsmentioning

confidence: 73%

“…The thickness of the substrate and the superstrate is ignored. We have solved the transcendental equation of (I), which has a complex root, by use of the same method previously used in [4].…”

Section: Configuration and Analysismentioning

confidence: 99%

Characteristics of magneto-static surface wave propagating in layered ferrimagnetic structure with a slightly absorptive superstrate

1995

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“…Propagation of magnetostatic waves (MSW's) in metalized yttrium-iron-garnet (YIG) films has been investigated by several authors [1]- [4]. The presence of a metal layer acts as a ground plane required to carry the return current from the microstrip transducer.…”

Section: Introductionmentioning

confidence: 99%

Magnetostatic volume waves in lossy YIG film backed by a metal of finite conductivity

Chakrabarti

Bhattacharya

1999

IEEE Trans. Microwave Theory Techn.

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Dispersion relations for magnetostatic volume waves propagation in a yttrium-iron-garnet (YIG) film coated with thin metal film of finite conductivity have been derived. The real and imaginary parts of the complex wavenumber are found by solving the dispersion relations. The effects of finite conductivity and thickness of the metal on the phase and attenuation constant for both magnetostatic forward volume wave and magnetostatic backward volume wave in lossy YIG film are discussed.Index Terms-Magnetostatic wave propagation.

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“…24 Other propagation and field configurations 25,26 and more complex structures, such as multilayer systems 27,28 and MCs in contact with a perfect electrical conductor, have been studied as well. 4,29 The dispersion of SWs in thin-film structures can be measured by different experimental techniques, in transmission with the use of microwave antennas 2 (also in magnetic structures in contact with a metal 3,21,22 ) or, since recently, by Brillouin light scattering (BLS). 30,31 The resolution of the BLS technique has proved adequate for the study of nanosize films, with a k step of the order of 0.5 × 10 6 1/m.…”

Section: Introductionmentioning

confidence: 99%

“…The analytical solutions for the SW frequencies f are more complicated; numerical solutions can be obtained, though. [21][22][23] The finite-difference time-domain method has been used for studying the broadband ferromagnetic resonance response of single-layer and bi-layer magnetic films in contact with a metal. 24 Other propagation and field configurations 25,26 and more complex structures, such as multilayer systems 27,28 and MCs in contact with a perfect electrical conductor, have been studied as well.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal dispersion of spin waves in ferromagnetic thin films covered with a finite-conductivity metal

Mruczkiewicz

Krawczyk

2014

Journal of Applied Physics

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We study the effect of one-side metallization of a uniform ferromagnetic thin film on its spin-wave dispersion relation in the Damon-Eshbach geometry. Due to the finite conductivity of the metallic cover layer on the ferromagnetic film the spin-wave dispersion relation may be nonreciprocal only in a limited wave-vector range. We provide an approximate analytical solution for the spin-wave frequency, discuss its validity and compare it with numerical results. The dispersion is analyzed systematically by varying the parameters of the ferromagnetic film, the metal cover layer and the value of the external magnetic field. The conclusions drawn from this analysis allow us to define a structure based on a 30 nm thick CoFeB film with an experimentally accessible nonreciprocal dispersion relation in a relatively wide wave-vector range.

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Characteristics of magnetostatic surface waves propagating in thin metal film coated ferrimagnetic layered structure

Cited by 4 publications

References 5 publications

Characteristics of magneto-static surface wave propagating in layered ferrimagnetic structure with a slightly absorptive superstrate

Characteristics of magneto-static surface wave propagating in layered ferrimagnetic structure with a slightly absorptive superstrate

Magnetostatic volume waves in lossy YIG film backed by a metal of finite conductivity

Nonreciprocal dispersion of spin waves in ferromagnetic thin films covered with a finite-conductivity metal

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