Optical determination of the exchange stiffness constant in an iron garnet
| Autor: | Matsumoto, Keita, Brächer, Thomas, Pirro, Philipp, Bozhko, Dmytro, Fischer, Tobias, Geilen, Moritz, Heussner, Frank, Meyer, Thomas, Hillebrands, Burkard, Satoh, Takuya |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Jpn. J. Appl. Phys. 57, 070508 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.7567/JJAP.57.070308 |
| Popis: | Brillouin light scattering measurements were performed in the backscattering geometry on a Bi-substituted rare earth iron garnet. We observed two different peaks, one attributed to a surface spin wave in the dipole-exchange regime. The other is referred to as a backscattering magnon mode, because the incident light in this case is scattered backward by exchange-dominated spin wave inside the material. We propose a method to estimate the exchange stiffness constant from the frequency of the backscattering magnon mode. The obtained value is comparable with the previously reported values for Y$ _3 $Fe$ _5 $O$ _{12} $. Comment: 11 pages, 6figures |
| Databáze: | arXiv |
| Externí odkaz: |
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