Geodesic
Phonons in a ferromagnetic crystal
Teoretičeskaâ i matematičeskaâ fizika, Tome 8 (1971) no. 1, pp. 119-129 Cet article a éte moissonné depuis la source Math-Net.Ru

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A general method is proposed for determining the frequency and damping of the lattice vibrations ofananharmonic ferromagnetic crystal. An exact equation is derived for the irreducible Green's functions; it describes the propagation of self-consistent phonons and the inelastic processes of scattering of these phonons due to the effective phonon-phonon and spin-phonon interactions, The self-energy operator is calculated with allowance for the three-phonon scattoting processes. 
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     author = {H. Konwent and N. M. Plakida},
     title = {Phonons in a~ferromagnetic crystal},
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     year = {1971},
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     language = {ru},
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}
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H. Konwent; N. M. Plakida. Phonons in a ferromagnetic crystal. Teoretičeskaâ i matematičeskaâ fizika, Tome 8 (1971) no. 1, pp. 119-129. http://geodesic.mathdoc.fr/item/TMF_1971_8_1_a11/

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