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024 7 _ |a 10.1088/1742-6596/1316/1/012018
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082 _ _ |a 530
100 1 _ |a Raymond, S.
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245 _ _ |a Total interference between nuclear and magnetovibrational one-phonon scattering cross sections
260 _ _ |a Bristol
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520 _ _ |a 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.
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700 1 _ |a Biniskos, N.
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700 1 _ |a Schmalzl, K.
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700 1 _ |a Persson, J.
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700 1 _ |a Brückel, T.
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773 _ _ |a 10.1088/1742-6596/1316/1/012018
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