This article is cited in 8 papers

Spin–density correlations and magnetic neutron scattering in ferromagnetic metals

N. B. Melnikov^a, G. V. Paradezhenko^a, B. I. Reser<sup>b

a</sup> Lomonosov Moscow State University, Moscow, Russia
^b Institute of Metal Physics, RAS, Ekaterinburg, Russia

Abstract: We obtain expressions for the spatial spin-density correlator and for effective and local magnetic moments in the dynamic spin-fluctuation theory. We derive formulas for the magnetic scattering cross section in the theory of itinerant electron magnets. We calculate magnetic characteristics of bcc Fe in the paramagnetic state and compare our numerical results with the polarized neutron scattering experiment. We show that the short-range order in bcc Fe persists up to a temperature much higher than the Curie temperature but at rather small distances (up to 5 Å).

Keywords: spin-density correlation, spin fluctuation, dynamic susceptibility, polarized neutron scattering, short-range order, ferromagnetic metal.

Received: 14.01.2016
Revised: 23.02.2016

DOI: 10.4213/tmf9152

 English version: Theoretical and Mathematical Physics, 2017, 191:1, 602–619

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