Localized and virtual magnetoelastic states in a linear ehain.

Considerable attention has been given in the last few years to the effect of magnetic and elastic impurities, respectively, on the dynamics of spins in ferromagnetic systems, and on lattice dynamics. This is due to their influence on such diverse phenomena as thermal conduction, neutrón scattering, Mósbauer effect, and others, in the materials in which they are present.