Crystal structure and magnetic properties of (Zr,Mn)Co2 compounds

X-ray and neutron powder diffraction were employed to study the crystal and magnetic structures of pseudo-binary Laves-phase compounds (Zr 1− x Mn x )Co 2 and (Zr 1− x Mn x )Co 2.45 . It is found that the Zr 0.8 Mn 0.2 Co 2 compound has the MgCu 2 -type cubic structure (space group Fd3m), while Zr 0.64 Mn 0.36 Co 2.45 and Zr 0.64 Mn 0.36 Co 2 have the AuBe 5 -type (space group F-43m) cubic structure. All compounds are ferromagnets.