Geodesic
Transverse susceptibility and the $T^{3/2}$ law in the dynamic spin-fluctuation theory
Teoretičeskaâ i matematičeskaâ fizika, Tome 181 (2014) no. 2, pp. 358-373 Cet article a éte moissonné depuis la source Math-Net.Ru

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We obtain explicit expressions for elements of the magnetic susceptibility tensor in the dynamic spin-fluctuation theory. Using an analytic continuation of the Green's functions, we show that the transverse susceptibility has spin-wave poles at low temperatures, yielding the asymptotic $T^{3/2}$ law for magnetization. We derive an explicit expression for the coefficient in the $T^{3/2}$ law based on the multiband Hubbard Hamiltonian and real band structure. We demonstrate the correct low-temperature behavior of magnetization in the example of iron.
Keywords: spin fluctuation, dynamic susceptibility, magnetization, $T^{3/2}$ law, low temperature. 
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N. B. Melnikov; B. I. Reser. Transverse susceptibility and the $T^{3/2}$ law in the dynamic spin-fluctuation theory. Teoretičeskaâ i matematičeskaâ fizika, Tome 181 (2014) no. 2, pp. 358-373. http://geodesic.mathdoc.fr/item/TMF_2014_181_2_a8/

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