Multifunctional operation of the double-layer ferromagnetic structure coupled by a rectangular nanoresonator
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Date
2021-05-05
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AIP Publishing
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Abstract
The use of spin waves as a signal carrier requires developing the functional elements allowing for multiplexing and demultiplexing information coded at different wavelengths. For this purpose, we propose a system of thin ferromagnetic layers dynamically coupled by a rectangular ferromagnetic resonator. We show that a single and double, clockwise and counter-clockwise, circulating modes of the resonator offer a wide possibility of control of propagating waves. Particularly, at frequency related to the double-clockwise circulating spin-wave mode of the resonator, the spin wave excited in one layer is transferred to the second one where it propagates in the backward direction. Interestingly, the wave excited in the second layer propagates in the forward direction only in that layer. This demonstrates add-drop filtering, as well as circulator functionality. Thus, the proposed system can become an important part of future magnonic technology for signal routing.
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The research leading to these results has received funding from the Polish National Science Centre, project no. UMO 2018/30/Q/ST3/00416.
Keywords
magnonics, spin waves, diode, circulator
Citation
Appl. Phys. Lett. 2021, vol. 118 (18); 182406.