Broadband conversion of microwaves into propagating spin waves in patterned magnetic structures (article)
Mushenok, F; Dost, R; Davies, C; et al.Allwood, D; Inkson, B; Hrkac, G; Kruglyak, V
Date: 1 July 2017
Journal
Applied Physics Letters
Publisher
AIP Publishing
Publisher DOI
Abstract
We have used time-resolved scanning Kerr microscopy (TRSKM) and micromagnetic simulations to demonstrate that, when driven by spatially uniform microwave field, the edges of patterned magnetic samples represent both efficient and highly tunable sources of propagating spin waves. The excitation is due to the ...
We have used time-resolved scanning Kerr microscopy (TRSKM) and micromagnetic simulations to demonstrate that, when driven by spatially uniform microwave field, the edges of patterned magnetic samples represent both efficient and highly tunable sources of propagating spin waves. The excitation is due to the local enhancement of the resonance
frequency induced by the non-uniform dynamic demagnetizing field generated by precessing magnetization aligned with the edges. Our findings represent a crucial step forward in the design of nanoscale spin-wave sources for magnonic architectures, and are also highly relevant to the understanding and interpretation of magnetization dynamics driven by
spatially-uniform magnetic fields in patterned magnetic samples.
Physics and Astronomy
Faculty of Environment, Science and Economy
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