Pappas, C.; Lelievre-Berna, E.; Falus, P.; Bentley, P.M.; Moskvin, E.; Grigoriev, S.; Fouquet, P.; Farago, B.: Chiral Paramagnetic Skyrmion-like Phase in MnSi. Physical Review Letters 102 (2009), p. 197202/1-4
10.1103/PhysRevLett.102.197202
Abstract:
We present a comprehensive study of chiral fluctuations in the reference helimagnet MnSi by polarized neutron scattering and neutron spin echo spectroscopy, which reveals the existence of a completely lefthanded and dynamically disordered phase. This phase may be identified as a spontaneous Skyrmion phase: it appears in a limited temperature range just above the helical transition TC and coexists with the helical phase at TC.