57Fe HYPERFINE INTERACTIONS FOR Dy(Fe1-xMnx)2

B. Gicala1, J. Pszczoła1, Z. Kucharski2, J. Suwalski2

1 Solid State Physics Department, AGH, Al. Mickiewicza 30, 30-059 Kraków, Poland,
2 Institute of Atomic Energy, 05-400 Świerk-Otwock, Poland

The 57Fe nuclei hyperfine interaction parameters of the cubic (MgCu2-type C-15) Dy (Fe1-xMNx)2 series were determined by Moessbauer spectroscopy (at 4.2 K). Magnetic hyperfine field falls down linearly with x. The magnetic hyperfine fields for Dy (Fe1-xMnx)2 and for Dy follow the Slater-Pauling curve.