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Magnetic and structural studies of rare earth-iron-manganese laves phase ternaries I

1976; Elsevier BV; Volume: 17; Issue: 1-2 Linguagem: Inglês

10.1016/0022-4596(76)90212-7

1095-726X

A. S. Ilyushin, W.E. Wallace,

Metallic Glasses and Amorphous Alloys

Structures, magnetic properties, and Mössbauer spectra of the systems Er(Fe1−xMnx)2 and Ho(Fe1−xMnx)2 are presented. The alloys are C15 structure for x in the range 0 to 0.6 and C14 for higher values of x. Incorporation of Mn in the lattice decreases the Curie temperature (Tc), presumably due to antiferromagnetic Fe-Mn interactions. For x > 0.2 the Mössbauer spectra at 300°K is a doublet since Tc < 300°K; the doublet splitting decreases with increasing x. Analysis of the structural results indicates that the charge on the Mn cores is higher in the C14 than in the C15 structure alloys.