Magnon dispersion and polarisatin determination of a Dresselhaus magnet
Antiferromagnetic spintronics has attracted considerable attention recently reflecting several advantages over ferromagnets. Whereas a practical implementation of it is missing, several potential avenues towards future applications remain unexplored. A new theory has been recently proposed for insulating magnets. It predicts a rich spin texture arising from a specific combination of Dzyaloshinskii-Moriya interaction, magnetic anisotropy and an application of magnetic fields. Whereas the effects on the magnon dispersion due to broken spatial inversion symmetry have been observed in several noncentrosymmetric magnets, resultant spin texture stabilized by such a specific combination in the theory has so far eluded experimental observation. We have got interested in the 2D Dresselhaus antiferromagnet Ba2MnGe2O7 which can likely be a model compound for a critical test of the theory. We thus aim for understanding and studying magnon dispersion and polarization/handedness through observing the chiral term and propose a full polarization analysis inelastic scattering experiment on Ba2MnGe2O7 using ThALES.
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Yusuke Nambu; BOEHM Martin; NILSEN Goran; STEFFENS Paul and ZIMAN Timothy. (2021). Magnon dispersion and polarisatin determination of a Dresselhaus magnet. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1649
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