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HomeSolid State PhenomenaSolid State Phenomena Vols. 233-234Low-Temperature Spin Fluctuations beyond Spin...

Low-Temperature Spin Fluctuations beyond Spin Waves

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Abstract:

A simple low-temperature dynamic spin-fluctuation theory of ferromagnetic metals is developed. The theory is based on the functional integral formalism for the multiband Hubbard Hamiltonian and takes into account both single-site and nonlocal spin fluctuations. We show that our approach correctly reproduces the T^3/2 law at low temperatures. The calculated results of magnetic properties for Fe and Fe_0.65Ni_0.35 Invar demonstrate that the approach works on a much wider temperature interval than the spin-wave approximation.

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Periodical:

Solid State Phenomena (Volumes 233-234)

Pages:

20-24

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.233-234.20

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Online since:

July 2015

Authors:

N.B. Melnikov*, B.I. Reser

Keywords:

Dynamic Susceptibility, Ferromagnetic Metals, Invar, Low Temperatures, Magnetization, Spin Fluctuations

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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