Structural and magnetic properties of (Fe1-xMnx)3P (x < 0.25)

Structural and magnetic properties of (Fe1-xMnx)(3)P compounds have been in vestigated by means of x-ray and neutron diffraction experiments, magnetiza tion measurements, Mossbauer experiments, and first principles calculations . The Curie temperature of the system decreases linearly and rapidly with i ncreasing Mn content. The zero temperature saturation magnetization, the lo cal magnetic moments, as well as the hyperfine fields on the different meta l positions of the system all decrease with increasing Mn content. The theo retical calculations, on the other hand, predict an increasing magnetic mom ent on the metal positions with increasing Mn content. This apparent discre pancy is discussed in the light of a good agreement between experimental an d theoretical results for the Co-substituted sister compounds (Fe1-xCox)(3) P.