Photo-Magnonics
2013 | review. A publication with affiliation to the University of Göttingen.
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- Authors
- Lenk, Benjamin; Garbs, Fabian; Ulrichs, Henning; Abeling, Nils O.; Muenzenberg, Markus G.
- Abstract
- In the framework of magnonics, all-optical femtosecond laser experiments are used to study spin waves and their relaxation paths. Magnonic crystal structures based on antidots allow the control over the spin-wave modes. In these two-dimensional magnetic metamaterials with periodicities in the wave-length range of dipolar spin waves, the spin-wave bands and dispersion are modified. Hence, a specific selection of spin-wave modes excited by laser pulses is possible. Different to photonics, the modes depend strongly on the strength of the magnetostatic potential at around each antidot site - the dipolar field. While this may lead to a mode localization, also for filling fractions around or below 10 %, Bloch states are found in low damping ferromagnetic metals. In this chapter, an overview of these mechanisms is given and the connection to spin-wave band spectra calculated from an analytical model is established. Namely, the plane-wave method yields flattened bands as well as band gaps at the antidot lattice Brillouin zone boundary.
- Issue Date
- 2013
- Status
- published
- Publisher
- Springer
- Series
- Topics in Applied Physics
- ISBN
- 978-3-642-30246-6
- ISSN
- 0303-4216