Temperature variation of surface-spin-wave frequencies in the Heisenberg ferromagnet: The exchange-dominated regime
- 1 May 1984
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 29 (9), 5081-5088
- https://doi.org/10.1103/physrevb.29.5081
Abstract
We develop the theory of the temperature variation of surface-spin-wave frequencies in the semi-infinite Heisenberg ferromagnet, for modes with wavelength sufficiently short that exchange interactions provide the dominant contribution to the excitation energy. Magnon-magnon interactions are the source of the temperature variation of the surface-spin-wave energies, and our attention is directed toward the leading contribution in the limit of low temperatures. We find a correction to the spin-wave frequencies, so the leading term exhibits the same temperature variation as found for bulk spin waves.
Keywords
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