Geodesic
Spin dynamics in the generalized ferromagnetic Kondo model for manganites
Teoretičeskaâ i matematičeskaâ fizika, Tome 120 (1999) no. 3, pp. 438-450

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We calculate the dynamic spin susceptibility in the generalized Kondo model describing the interaction between the band $e_g$ electrons and the localized $t_{2g}$ electrons coupled via the antiferromagnetic exchange. We show that the spin-wave spectrum in the ferromagnetic phase has acoustic and optical branches in the mean-field approximation. We evaluate the self-energy corrections to the spectrum and estimate the damping of acoustic magnons. 
@article{TMF_1999_120_3_a6,
     author = {N. B. Perkins and N. M. Plakida},
     title = {Spin dynamics in the generalized ferromagnetic {Kondo} model for manganites},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {438--450},
     publisher = {mathdoc},
     volume = {120},
     number = {3},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1999_120_3_a6/}
}
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N. B. Perkins; N. M. Plakida. Spin dynamics in the generalized ferromagnetic Kondo model for manganites. Teoretičeskaâ i matematičeskaâ fizika, Tome 120 (1999) no. 3, pp. 438-450. http://geodesic.mathdoc.fr/item/TMF_1999_120_3_a6/