Low Energy Excitations of SkyrmionLattice in Mn1-xCoxSi
Topological spin textures have been extensively investigated both experimentally and theoretically. Among them, a vortex-like spin-swirling texture of so-called magnetic skyrmions has attracted much attention. A helimagnet MnSi possesses a magnetic skyrmion phase in a small magnetic field and temperature region. However, the dynamics of magnetic skyrmions has not been clear because inelastic neutron scattering measurements with an energy scale of 1~5 µeV in a small q region is not easy. Recently, a theoretical study on the magnetic skyrmions has been carried out and then not only the difference between the magnetic dispersions for the helical and skyrmion structures but also the different q dependence of magnetic excitations have been predicted. For Mn1-xCoxSi (x=0 and/or 0.02), an energy scale and a Q range of interest are about 0.1~50 µeV and 0.02<Q< 0.1 A-1, respectively, and q resolution of necessity is an order of ~0.01 A-1. IN15 allows us to search such (q,E) region. Therefore, to clarify the asymmetric dispersion of the magnetic skyrmion dynamics of Mn1-xCoxSi, we would like to propose inelastic measurements at IN15.
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FORGAN Edward M.; BLACKBURN Elizabeth; CAMPILLO Emma; FURUKAWA K. Hazuki; HOFFMANN Ingo; Vasyl Ryukhtin and SODA Minoru. (2018). Low Energy Excitations of SkyrmionLattice in Mn1-xCoxSi. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1584
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