Geodesic
Nonresonant acoustic absorption of Ising magnet
Teoretičeskaâ i matematičeskaâ fizika, Tome 98 (1994) no. 1, pp. 149-159

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Zubarev's nonequilibrium statistical operator method is used to construct a theory of the nonresonant acoustic absorption of the linear Ising magnet, the basic Hamiltonian of which is of the two-particle kind and is treated without approximations. The frequency dependence of the absorption is determined and found to differ analytically from the well-known Debye curve $\chi''_{\textup{Д}}(\omega)$ but for reasonable values of the physical parameters gives an envelope that agrees qualitatively with $\chi''_{\textup{Д}}(\omega)$. 
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     author = {I. S. Donskaya and A. R. Kessel and S. S. Lapushkin},
     title = {Nonresonant acoustic absorption of {Ising} magnet},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {149--159},
     publisher = {mathdoc},
     volume = {98},
     number = {1},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1994_98_1_a10/}
}
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I. S. Donskaya; A. R. Kessel; S. S. Lapushkin. Nonresonant acoustic absorption of Ising magnet. Teoretičeskaâ i matematičeskaâ fizika, Tome 98 (1994) no. 1, pp. 149-159. http://geodesic.mathdoc.fr/item/TMF_1994_98_1_a10/