Spin wave resonances in antiferromagnets
| Autor: | von Nidda, H. -A. Krug, Svistov, L. E., Prozorova, L. A. |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Low Temp. Phys. v. 36, p. 736 (2010) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/1.3490859 |
| Popis: | Spin wave resonances with enormously large wave numbers corresponding to wave vectors 10^5-10^6 cm^{-1} are observed in thin plates of FeBO3. The study of spin wave resonances allows one to obtain information about the spin wave spectrum. The temperature dependence of a non-uniform exchange constant is determined for FeBO3. Considerable softening of the magnon spectrum resulting from the interaction of magnons, is observed at temperatures above 1/3 of the Neel temperature. The excitation level of spin wave resonances is found to depend significantly on the inhomogeneous elastic distortions artificially created in the sample. A theoretical model to describe the observed effects is proposed. Comment: 6 pages, 6 figures |
| Databáze: | arXiv |
| Externí odkaz: |
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