MSFVW beam steering and spreading over large path lengths

Floyd, R. E.; Sethares, J.C.

doi:10.1063/1.333713

Cited by 5 publications

(7 citation statements)

References 3 publications

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“…Result of the pure GH shift in dependence on the pinning parameter obtained from the analytical model [Eq. (14)] is presented in Fig. 4(a).…”

Section: Resultsmentioning

confidence: 99%

“…In our interpretation this inhomogeneity is responsible for a shift of ∆X in MMS towards negative values as compared to the results of Eq. (14) [see, Fig. 6]: for very high positive K s the ∆X GH monotonously tends to 0 in the analytical model [ Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Here, we propose the simple analytical model of the wave bending, which allows to estimate factor which correct the value of the GH SW beam's shift obtained from Eq. (14). We will consider gradual change of the refractive index for SWs in the vicinity of the film edge.…”

Section: Resultsmentioning

confidence: 99%

“…In this case ∆X bending = 0 and ∆X = ∆X GH , i.e, the total shift is equal to Eq. (14). The obtained curve is plotted in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Influence of magnetic surface anisotropy on spin wave reflection from the edge of ferromagnetic film

et al. 2015

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We study propagation of the Gaussian beam of spin waves and its reflection from the edge of thin yttrium-iron-garnet film with in-plane magnetization perpendicular to this edge. We have performed micromagnetic simulations supported by analytical calculations to investigate the influence of the surface magnetic anisotropy present at the film edge on the reflection, especially in the context of the Goos-Hänchen effect. We have shown the appearance of a negative lateral shift between reflected and incident spin wave beams' spots. This shift is particularly sensitive to the surface magnetic anisotropy value and is a result of the Goos-Hänchen shift which is sensitive to the magnitude of the anisotropy and of the bending of the spin wave beam. We have demonstrated that the demagnetizing field provide graded increase of the refractive index for spin waves, which is responsible for the bending.PACS numbers: 75.30.Ds, 75.30.Gw, 75.70.Rf, 75.78.Cd In recent years magnetic nanostructures with controlled magnetization dynamics have been considered as candidates for design of new miniaturized devices with enhanced performance and functionality for various applications, e.g. heat transport, energy conversion, magnetic field sensing, information storage and processing. 1-3 Spin waves (SWs), being propagating collective excitations of the magnetization are also regarded as information carriers, which can be exploited for information processing in devices potentially competitive with standard CMOS systems. 4,5 Thus, understanding of SW properties in nanostructures is crucial in designing magnonic units and this is one of the main goal in the research field called magnonics. 6,7 It is expected that magnonic devices allow energy-efficient processing of information which will combine the advantages of photonics (high frequency and wide band) and electronics (miniaturization) in a single unit. 8 One of the basic phenomena connected with wave propagation is the wave transmission and reflection. [9][10][11] The reflection of SWs is determined by magnetic properties of the film and boundary conditions at the border of the ferromagnetic material. The reflection of SWs has already been investigated in theoretical and experimental papers 10,12 where SWs were treated as plane waves. Use of wave beams, instead of the plane waves or spherical waves, in many cases, can be much more useful and opens new possibilities due to its coherence and low divergence. The known example of the wave beam is a light beam emitted by laser. Usually, its intensity profiles can be described by Gaussian distribution (beams with such property are called Gaussian beams). However, in magnonics the idea of SW beams is unexplored, with only a few theoretical and experimental studies considering formation of SW beams at low frequencies due to the caustic or nonlinear effects. [13][14][15][16][17][18][19] An interesting phenomenon characteristic for the reflection of beam is a possibility for occurrence of a lateral shift of the beam spot along the interface between...

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“…Result of the pure GH shift in dependence on the pinning parameter obtained from the analytical model [Eq. (14)] is presented in Fig. 4(a).…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…In this case ∆X bending = 0 and ∆X = ∆X GH , i.e, the total shift is equal to Eq. (14). The obtained curve is plotted in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Influence of magnetic surface anisotropy on spin wave reflection from the edge of ferromagnetic film

et al. 2015

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“…Other kinds of excitations, specifically, coherent low-divergence spin-wave beams (SWBs), the application of which would open new possibilities, have not been explored to date. There are only a few theoretical and experimental studies on the formation of low-frequency SW beams; research in this field is hampered by caustics, nonlinear effects and difficulties related to excitation by nanooscillators or width-modulated microwave transducers [22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Goos-Hänchen shift of a spin-wave beam transmitted through anisotropic interface between two ferromagnets

et al. 2017

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The main object of investigation in magnonics, spin waves (SWs) are promising information carriers. Presently the most commonly studied are plane wave-like SWs and SWs propagating in confined structures, such as waveguides. Here we consider a Gaussian SW beam obliquely incident on an ultra-narrow interface between two identical ferromagnetic materials. We use an analytical model and micromagnetic simulations for an in-depth analysis of the influence of the interface properties, in particular the magnetic anisotropy, on the transmission of the SW beam. We derive analytical formulas for the reflectance, transmittance, phase shift and Goos-Hänchen (GH) shift for beams reflected and refracted by an interface between two semi-infinite ferromagnetic media; the results for the refracted beam are the first to be reported to date. The GH shifts in SW beam reflection and transmission are confirmed by micromagnetic simulations in the thin-film geometry. We demonstrate the dependence of the characteristic properties on the magnetic anisotropy at the interface, the angle of incidence and the frequency of the SWs. We also propose a method for the excitation of high-quality SW beams in micromagnetic simulations.

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Spin-wave diffraction in a homogeneous ferromagnetic layer

Vlaskin¹,

Novikov²

1989

Soviet Physics Journal

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MSFVW beam steering and spreading over large path lengths

Abstract: Acoustic method for measuring the sound speed of gases over small path lengths Rev. Sci. Instrum. 78, 054901 (2007);

Cited by 5 publications

References 3 publications

Influence of magnetic surface anisotropy on spin wave reflection from the edge of ferromagnetic film

Influence of magnetic surface anisotropy on spin wave reflection from the edge of ferromagnetic film

Goos-Hänchen shift of a spin-wave beam transmitted through anisotropic interface between two ferromagnets

Spin-wave diffraction in a homogeneous ferromagnetic layer

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