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We obtain the exact one-spin intrinsic localized excitation in an anisotropicHeisenberg ferromagnetic spin chain in a constant/variable external magneticfield with Gilbert damping included. We also point out how an appropriatemagnitude spin current term in a spin transfer nano-oscillator (STNO) canstabilize the tendency towards damping. Further, we show how this excitationcan be sustained in a recently suggested PT-symmetric magnetic nanostructure.We also briefly consider more general spin excitations.

physics letters a

Exact Intrinsic Localized Excitation of an Anisotropic Ferromagnetic  Spin Chain in External Magnetic Field with Gilbert Damping, Spin Current and  PT-Symmetry