Localized excitations and scattering of spin waves in ferromagnetic chains containing magnetic nanoclusters

The spectrum of localized excitations in an anisotropic one-dimensional ferromagnet containing a spin cluster of arbitrary size was found accurately within the framework of the discrete Takeno-Homma model. The stability boundaries of spin nanoclusters are determined depending on their size and the ferromagnet's exchange and anisotropy parameters. The problem of scattering of spin waves by nanoclusters is solved and explicit analytical expressions are obtained for their reflection and transmission coefficients. A model of a metamaterial consisting of weakly interacting magnetic molecular nanoclusters with the discovered dynamic properties is proposed. Published by AIP Publishing.