Generation of propagating spin waves from regions of increased dynamic demagnetising field near magnetic antidots
- School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL (United Kingdom)
- Laboratory “Metamaterials,” Saratov State University, Saratov 410012 (Russian Federation)
We have used Brillouin Light Scattering and micromagnetic simulations to demonstrate a point-like source of spin waves created by the inherently nonuniform internal magnetic field in the vicinity of an isolated antidot formed in a continuous film of yttrium-iron-garnet. The field nonuniformity ensures that only well-defined regions near the antidot respond in resonance to a continuous excitation of the entire sample with a harmonic microwave field. The resonantly excited parts of the sample then served as reconfigurable sources of spin waves propagating (across the considered sample) in the form of caustic beams. Our findings are relevant to further development of magnonic circuits, in which point-like spin wave stimuli could be required, and as a building block for interpretation of spin wave behavior in magnonic crystals formed by antidot arrays.
- OSTI ID:
- 22485934
- Journal Information:
- Applied Physics Letters, Vol. 107, Issue 16; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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