Longitudinal polarization analysis of the non-reciprocal magnons in the skyrmion, conical and field-polarized phases of MnSi
We recently completed our study into magnon dynamics in all magnetically ordered phases of the itinerant magnet MnSi, including the conical, the field-polarized and the skyrmion phase. The main result was the identification of non-reciprocal (asymmetric) dynamics in all of the individual phases. Even with all of our previous scans being unpolarized, our theoretical model predicts a re-shuffling of spectral weights between the polarization channels as a mechanism of the observed asymmetries. With longitudinal polarization analysis and the high flux at Thales we wish to resolve these theoretical observations. Recently, we performed a two-day internal test experiment and feasibility study for longitudinal polarization analysis of the skyrmion dynamics at Thales (see attached report INTER-413), which yielded highly promising results, clearly showing a separation of the non-reciprocal magnons in the skyrmion phase into the two spin-flip channels. Due to the importance of the experiments and the strong competition, we ask to continue our initial internal studies optimally using nine days of beamtime (minimally six days would be sufficient).
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Tobias WEBER; BAUER Andreas; BOENI Peter and STEFFENS Paul. (2019). Longitudinal polarization analysis of the non-reciprocal magnons in the skyrmion, conical and field-polarized phases of MnSi. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1597
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