This title appears in the Scientific Report :
2019
Please use the identifier:
http://hdl.handle.net/2128/23808 in citations.
Please use the identifier: http://dx.doi.org/10.1088/1742-6596/1316/1/012018 in citations.
Total interference between nuclear and magnetovibrational one-phonon scattering cross sections
Total interference between nuclear and magnetovibrational one-phonon scattering cross sections
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)...
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Personal Name(s): | Raymond, S. |
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Biniskos, N. (Corresponding author) / Schmalzl, K. / Persson, J. / Brückel, T. | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-ILL; JCNS-ILL JARA-FIT; JARA-FIT Streumethoden; PGI-4 |
Published in: | Journal of physics / Conference Series, 1316 (2019) 1, |
Imprint: |
Bristol
IOP Publ.
2019
|
DOI: |
10.1088/1742-6596/1316/1/012018 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) Materials and Processes for Energy and Transport Technologies Quantum Condensed Matter: Magnetism, Superconductivity Controlling Collective States Controlling Collective States |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1088/1742-6596/1316/1/012018 in citations.
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. |