Generation of Propagating Spin Waves from Edges of Magnetic Nanostructures Pumped by Uniform Microwave Magnetic Field
IEEE Transactions on Magnetics
Institute of Electrical and Electronics Engineers (IEEE)
Thin-film patterned magnetic nanostructures are widely employed within perceived magnonic device architectures to guide and/or manipulate spin waves for data processing and communication purposes. Here, using micromagnetic simulations, we explore how the internal magnetic field nonuniformity inherent to patterned magnetic nanostructures can also be exploited to create spin-wave sources. The spin-wave emission is achieved through the resonant excitation of finite-sized regions of increased effective magnetic field formed near the edges of patterned structures. The phenomenon is rather universal and could be used to generate magnetodipole, dipole-exchange, and exchange dominated spin waves. Depending on the frequency of excitation and parameters of the nanostructures, the emitted spin waves may form either highly directional spin-wave caustic beams or more regular plane spin waves.
This work was supported by the U.K. Engineering and Physical Sciences Research Council under Project EP/L019876/1 and Project EP/P505526/1.
This is the author accepted manuscript. The final version is available from IEEE via the DOI in this record.
Vol. 52 (7), article 2300504
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