Near room temperature helical magnetism in Fe(1-x)Cr(x)Ge*

Helical magnetic structures in chiral metallic magnets have attracted much interest recently because of the observation of complex spin textures, for example the skyrmion lattice.~ FeGe is a known B20 spiral ferromagnet that orders at the relatively high temperature of 280K with a helical modulation period of 700 angstroms, which propagates along either the [100] or [111] directions depending on temperature. ~Here we report a study on the evolution of helimagnetism as a function of Cr doping on a series of Fe(1-x)Cr(x)Ge samples with x $=$ 0.03 to 1. Magnetic susceptibility measurements have shown that the ferromagnetic-like transition associated with helimagnetism in FeGe is suppressed around x $=$ 0.4.~