Debye–Waller factor in neutron scattering by ferromagnetic metals

G. V. Paradezhenko   ; N. B. Melnikov   ; B. I. Reser

Teoretičeskaâ i matematičeskaâ fizika, Tome 195 (2018) no. 1, pp. 91-104

Résumé

We obtain an expression for the neutron scattering cross section in the case of an arbitrary interaction of the neutron with the crystal. We give a concise, simple derivation of the Debye–Waller factor as a function of the scattering vector and the temperature. For ferromagnetic metals above the Curie temperature, we estimate the Debye–Waller factor in the range of scattering vectors characteristic of polarized magnetic neutron scattering experiments. In the example of iron, we compare the results of harmonic and anharmonic approximations.

Détail

Keywords: neutron scattering, lattice vibration, Debye–Waller factor, spin–density correlation, ferromagnetic metal.

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