NUKLEONIKA 2007, 52(Supplement 1):S55-S58

MÖSSBAUER EFFECT STUDIES OF Dy(Fe0.4-xNixCo0.6)2 COMPOUNDS

Agata Jabłońska1, Jan Suwalski1, Paweł Stoch1,2, Jarosław Pszczoła3, Piotr Guzdek3, Paweł Szamański3, Antoni Pańta4

1 Nuclear Methods of Solid State Physics Department, Institute of Atomic Energy, 05-400 Otwock-Świerk, Poland
2 Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30 A. Mickiewicza Ave, 30-059 Kraków, Poland
3 Department of Nuclear Methods, AGH University of Science and Technology, 30 A. Mickiewicza Ave., 30-059 Kraków, Poland
4 Department of Metallurgy and Materials Engineering, AGH University of Science and Technology, 30 A. Mickiewicza Ave., 30-059 Kraków, Poland

A consequence of the Fe/Ni substitution in the Dy(Fe0.4Co0.6)2 compound was studied in the present paper. For this purpose the synthesis and X-ray analysis (295 K) of the Dy(Fe0.4-xNixCo0.6)2 series were performed. The cubic, MgCu2-type, Fd3m crystal structure was observed across the series. 57Fe Mössbauer effect spectra for the series were collected at 77 K. The obtained crystallographic data and the hyperfine interaction parameters are presented. The magnetic hyperfine fields form a separate branch of the Slater-Pauling curve known for the Dy(Mn1-xFex)2 and Dy(Fe1-xCox)2 series. The data are qualitatively related to the Stoner model.