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Spatial control of spin-wave modes in Ni80Fe20 antidot lattices by embedded Co nanodisks
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) Scanning electron microscopy image of sample 1 consisting of Co nanodisks (dark) in a 26 nm thick Py film (bright) on GaAs. The dark square is an artefact. (b) CPWs on top of the magnetic mesa (dark). The label G (S) denotes a ground (signal) line. Schematic cross sections of (c) Co/Py sample 1 and (d) Py sample 2. Seven nanometer deep troughs were etched into both samples. For sample 1, 15 nm thick Co nanodisks were deposited in situ.

Image of FIG. 2.
FIG. 2.

(Color online) Measured (left) and simulated (right) spin wave resonances of the Co/Py sample 1 [(a) and (c)] and Py sample 2 [(b) and (d)]. AESWS (BLS) data are presented as grey-scale plots (circles). The in-plane field was applied along the edge of the squared unit cell. Open squares and diamonds mark the modes addressed in Fig. 3.

Image of FIG. 3.
FIG. 3.

(Color online) Measured spin precession profiles (2 × 2 μm2) obtained by μBLS (first and third column) and simulated ones (second and fourth column). μ 0H = 10 mT is applied along the white arrow. The outer edge of the CPWs ground line is at the left edge of each graph. Co/Py sample 1 (Py sample 2) is shown in graphs (a) through (d) [(e) through (h)]. Relevant frequencies are given. Dotted circles in (a), (b), (e), and (f) are nanotrough positions extracted from microscopy.

Image of FIG. 4.
FIG. 4.

(Color online) Simulated H dem for (a) Co/Py sample 1 and (b) Py sample 2. Arrows show the direction of H dem. Color and contour lines encode the intensity of H dem projected on H (large arrow). The nearly horizontal contour lines extending from left to right represent H dem = 0. Further lines encode variations in steps of 10 mT.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spatial control of spin-wave modes in Ni80Fe20 antidot lattices by embedded Co nanodisks