Abstract
A study of the magnetic structure ofYFe4Al8 is presented, based on the reported magnetic structure, as givenby a neutron diffraction study; cycloid, with moments in thea–b plane and with twoFe sublattices with a 140° phase difference between them. Calculations were performed, using density functionaltheory, for cycloids with , with τ varying between 0 and 1. The calculated magnetic structure agrees with the structurededuced from neutron diffraction results, however with a simpler description. TheYFe4Al8 magnetic structure can be described by a single Fe lattice with a cycloid propagation vector with τ = 0.865; there is no need for a second Fe lattice with an arbitrary phasedifference. We show that the same description can be applied toDyFe4Al8 and HoFe4Al8.
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