The absorption of high-frequency energy in three-magnon processes in a quasi-one-dimensional ferromagnet

We calculate the absorption coefficient of high-frequency energy in a quasi-one-dimensional ferromagnet. In processes with the participation of three magnons, the high density of magnon states in the low-energy part of the spectrum results in considerable losses of electromagnetic radiation with frequencies close to the limiting values of the magnon energy in the direction of strong exchange interaction. The obtained results are applicable to quasi-one-dimensional antiferromagnets which consist of ferromagnetic chains coupled by a weak antiferromagnetic interaction.

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