The magnetic structure factor of equi-atomic FeCo in the disordered phase has been measured at 1000 K by coherent scattering of polarized neutrons. The overall shape of the magnetization distribution exhibits marked variations when compared with the room-temperature distribution. The analysis of the spin density asphericity shows that such an effect cannot be ascribed to a change in the electron distribution in the disordered phase, whereas a correct treatment of the thermal motion of nuclei, inducing a deformation of the electron distribution, takes into account the observed behaviour.
High-temperature spin density of FeCo: effect of lattice vibrations on the electron distribution
PETRILLO, Caterina;SACCHETTI, Francesco
1994
Abstract
The magnetic structure factor of equi-atomic FeCo in the disordered phase has been measured at 1000 K by coherent scattering of polarized neutrons. The overall shape of the magnetization distribution exhibits marked variations when compared with the room-temperature distribution. The analysis of the spin density asphericity shows that such an effect cannot be ascribed to a change in the electron distribution in the disordered phase, whereas a correct treatment of the thermal motion of nuclei, inducing a deformation of the electron distribution, takes into account the observed behaviour.File in questo prodotto:
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