Noncollinear spin-density-wave antiferromagnetism in FeAs
Noncollinear spin-density-wave antiferromagnetism in FeAs
The nature of the magnetism in the simplest iron arsenide is of fundamental importance in understanding the interplay between localized and itinerant magnetism and superconductivity. We present the magnetic structure of the itinerant monoarsenide FeAs with the B31 structure. Powder neutron diffraction confirms incommensurate modulated magnetism with wave vector $\mathbf{q}=(0.395\ifmmode\pm\else\textpm\fi{}0.001){\mathbf{c}}^{*}$ …