Skyrmion lattice and helimagnetism in Cu2OSeO3

Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3.
T. Adams, A. Chacon, M. Wagner, A. Bauer, G. Brandl, B. Pedersen, H. Berger, P. Lemmens, and C. Pffeiderer
ArXiv 1204.3597 (2012)

Magnetic phase diagram of Cu2OSeO3 as a function of applied magnetic field for various
orientations inferred from the magnetisation. (a) Overview for eld parallel h111i. Panels (b) through (d): Phase diagram
in the vicinity of Tc for various orientations. Di fferences as a function of eld are mostly due to demagnetising e ffects;
the brown shading indicates the regime of nearly critical spin fluctuations.