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Spin-wave interference
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Model geometry of a thick Py film incorporating an Fe film at position of and its lateral dimensions along with the coordinates used in the micromagnetic simulation of spin-wave interference. The colors represent the in-plane orientations of the local magnetizations at equilibrium in the given geometry under zero magnetic field, as indicated by the colored wheel in the top left-hand corner. The point marked by is situated at ; the two points marked by are at (755, 85) and . The gray-colored rectangular box indicates the area of and . The straight lines of and are placed at and , and and , respectively, while the curved line of is situated along the black-colored line, as noted, in the region of and .

Image of FIG. 2.
FIG. 2.

(Color online) Perspective-view images of the spatial distributions of the local components for the circular disk in (a) and plane view images for the Y-shaped waveguide in (b) at the indicated times. The color bars indicate the components.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Snapshot image taken at for the dynamic evolution of the local distribution in the area marked by the gray-colored rectangular box shown in Fig. 1, illustrating the interference pattern of SWs diffracted through the two openings marked by . (b) and (c) show their FFT power and phase for , respectively.

Image of FIG. 4.
FIG. 4.

(Color online) Frequency spectra along the black curved line noted as , as shown in Fig. 1, which are obtained from the FFT of the temporal variations of the values. (a), (b), and (c) represent the individual regions of the circular disk, the Y-shaped waveguide, and the -shaped medium, respectively. The Y-shaped waveguide is classified into three regions, which correspond to a single channel (, , and ), a curved channel , and a branched channel . The Fe segment in the single channel is noted as . The horizontal gray lines correspond to , 13, and .

Image of FIG. 5.
FIG. 5.

(Color online) Dispersion relations calculated along the two different lines indicated by and , as shown in Fig. 1. The black-colored lines in the domain are the results of theoretical calculations using an analytical dispersion equation reported in Ref. 12 for the cases where the propagation directions of SWs are parallel and perpendicular to the magnetization orientations.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spin-wave interference