TY  - JOUR
AU  - Raymond, S.
AU  - Biniskos, N.
AU  - Schmalzl, K.
AU  - Persson, J.
AU  - Brückel, T.
TI  - Total interference between nuclear and magnetovibrational one-phonon scattering cross sections
JO  - Journal of physics / Conference Series
VL  - 1316
IS  - 1
SN  - 1742-6588
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2020-00083
SP  -  
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000562316600018
DO  - DOI:10.1088/1742-6596/1316/1/012018
UR  - https://juser.fz-juelich.de/record/872585
ER  -