%0 Journal Article
%A Raymond, S.
%A Biniskos, N.
%A Schmalzl, K.
%A Persson, J.
%A Brückel, T.
%T Total interference between nuclear and magnetovibrational one-phonon scattering cross sections
%J Journal of physics / Conference Series
%V 1316
%N 1
%@ 1742-6588
%C Bristol
%I IOP Publ.
%M FZJ-2020-00083
%P  
%D 2019
%X A full phonon intensity cancellation is reported in a longitudinal polarized inelastic neutron scattering experiment performed on the magnetocaloric compound MnFe4Si3, a ferromagnet with TCurie ≈ 305 K. The TA[100] phonon polarized along the c-axis measured from the Brillouin zone center G=(0, 0, 2) is observed only in one ($\sigma _z^{ + + }$) of the two non-spin-flip polarization channels and is absent in the other one ($\sigma _z^{ - - }$) at low temperatures. This effect disappears at higher temperatures, in the vicinity of TCurie , where the phonon is measured in both channels with nonetheless marked different intensities. The effect is understood as originating from nuclear-magnetic interference between the nuclear one-phonon and the magnetovibrational one-phonon scattering cross-sections. The total cancellation reported is accidental, i.e. does not correspond to a systematic effect, as established by measurements in different Brillouin zones.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000562316600018
%R 10.1088/1742-6596/1316/1/012018
%U https://juser.fz-juelich.de/record/872585