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Surface acoustic wave in yttrium iron garnet as tunable magnonic crystals for sensors and signal processing applications
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10.1063/1.4714507
/content/aip/journal/apl/100/19/10.1063/1.4714507
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/19/10.1063/1.4714507
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Diagram of interactions of incident and reflected SMSW at inelastic scattering by SAW. 1, 2—dispersion curves ω(k) of SMSW travelling in opposite directions along sample.

Image of FIG. 2.
FIG. 2.

Experimental sample configurations for investigations of SAW-YIG magnonic crystals. (a) Monolithic sample with SAW excitation with the help of ZnO film. (b) Top and side view of compound samples with “bridge” method of SAW excitation.

Image of FIG. 3.
FIG. 3.

IL as a function of frequency, f, (amplitude-frequency response) of SMSW channel of SAW-YIG magnonic crystal. SMSW and SAW propagated in the same direction. Surrounding temperature T = 20 °C and HO = 640 Oe. (1) Monolithic sample: SAW frequency = 41 MHz, power 50mW; IDT: 14 pairs of electrodes with 80-µm-period; YIG film: thickness 8.6 μm, 2ΔH = 0.7 Oe, distance between antennas 10 mm. (2) Compound sample: SAW frequency = 70 MHz, power 40 mW; IDT: 6 pairs of electrodes with 50-µm-period; YIG film: thickness 7.7 μm, 2ΔH = 0.5 Oe, distance between antennas 15 mm.

Image of FIG. 4.
FIG. 4.

Measured dependencies of magnonic gap frequency, fg, on temperature, T, in SAW-YIG magnonic crystal at SMSW and SAW propagating in the same direction. Monolithic sample: SAW frequency = 1–43 MHz, 2–40 MHz, 3–38 MHz; IDT: 10 pairs of electrodes, 80 µm-period; YIG film: thickness 8.6 μm, 2ΔH = 0.7 Oe, and HO = 640 Oe.

Image of FIG. 5.
FIG. 5.

Magnonic gap frequency, fg, as a function of SAW frequency, F, inSAW-YIG magnonic crystal. HO = 640 Oe. Surrounding temperature T = 20 °C. Solid lines—theory (see Ref. 12). (a) Compound sample. 1—YIG film thickness 8.4 μm, 2ΔH = 0.5 Oe. 2—Film thickness 7.7 μm, 2ΔH = 0.5 Oe. Four different IDTs: (1) 7 pairs of electrodes, 170 μm-period, (2) 7 pairs, 86 μm-period, (3) 6 pairs, 50 μm-period, (4) 6 pairs, 35 μm-period.Distance between the antennas 15 mm. SAW and SMSW propagated in the same direction. (b) Monolithic sample. IDT: 10 pairs of electrodes with period of 80 μm. YIG: film thickness 8.4 μm, 2ΔH = 0.5 Oe. Distance between antennas 10 mm.

Image of FIG. 6.
FIG. 6.

Measured depth of the magnonic gap, Dg, as a function of SAW power, PSAW. Monolithic sample. SAW frequency = 41 MHz, IDT: 14 pairs of electrodes, 80 µm-period. YIG film thickness 8.4 μm, 2ΔH = 0.5 Oe. SAW and SMSW propagated in the same direction. Distance between antennas 10 mm. Surrounding temperature T = 20 °C.

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/content/aip/journal/apl/100/19/10.1063/1.4714507
2012-05-09
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Surface acoustic wave in yttrium iron garnet as tunable magnonic crystals for sensors and signal processing applications
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/19/10.1063/1.4714507
10.1063/1.4714507
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