Magnonic waveguide based on exchange-spring magnetic structure
Source abstract
Abstract
A soft/hard exchange-spring coupled bilayer magnetic structure is proposed to obtain a narrow channel for spin-wave propagation. Micromagnetic simulations show that broad-band Damon-Eshbach geometry spin waves are strongly constrained within the channel and propagate effectively with a high group velocity. The beam width of the bound spin waves is almost independent from the frequency and is smaller than 24nm. Two side spin beams appearing at the low-frequency excitation are demonstrated to be coupled with the channel spins by dipole-dipole interaction. In contrast to a domain wall, the channel formed by exchange-spring coupling is easier to be realized in experimental scenarios and holds stronger immunity to surroundings. This work is expected to open new possibilities for energy-efficient spin-wave guiding as well as to help shape the field of beam magnonics.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Magnetic properties of thin films · Physics of Superconductivity and Magnetism · Quantum and electron transport phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China , 610054 Chengdu, China
Funding
National Key Research and Development Plan · Sichuan Science and Technology Support Project · National Natural Science Foundation of China
References (38)
Show source-provided references
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