Localised magnetic excitations of coupled impurities in a transverse Ising ferromagnet
arXiv:cond-mat/0411119 · doi:10.1016/j.jmmm.2004.12.039
Abstract
A Green's function formalism is used to calculate the spectrum of excitations of two neighboring impurities implanted in a semi-infinite ferromagnetic. The equations of motion for the Green's functions are determined in the framework of the Ising model in a transverse field and results are given for the effect of the exchange coupling, position and orientation of the impurities on the spectra of localized spin wave modes.
8 pages, 7 figures