Arsenic-stabilized magnetic helicoid in FeP0.9As0.1

Abstract

The 10 % substitution of arsenic for phosphorus in FeP represents an excellent example of the preservation of the crystal and helimagnetic structure, accompanied by stabilization of the latter. Although magnetic order in FeP_0.9As_0.1 forms at lower temperature of ∼ 90 K, it turns out to be much more resistant to an external magnetic field. Namely, no spin-reorientation transition was observed up to 12 T, as well as any other distortion of the helical magnetic structure, in contrast to the parent compound FeP.