Spin-wave resonance in multilayer films (one-dimensional magnon crystals). Identification rules |
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| Authors: | R. S. Iskhakov S. V. Stolyar M. V. Chizhik L. A. Chekanova |
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| Affiliation: | 1.Kirensky Institute of Physics, Siberian Branch,Russian Academy of Sciences,Krasnoyarsk,Russia;2.Siberian Federal University,Krasnoyarsk,Russia |
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| Abstract: | The characteristic modification of the spectrum of the exchange spin waves has been revealed in ferromagnet/ferromagnet multilayer films with a thickness of N(d 1 + d 2) by the spin-wave resonance method. This modification is due to the first bandgap at the wavenumber k b = π/(d 1 + d 2) of a magnon crystal, which is formed by one-dimensional modulation of the magnetization. It has been shown that the transformation of the multilayer film with thermal annealing to the film of a single-phase alloy is accompanied by the disappearance of this modification of the spectrum. |
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