Electrical resistivity studies of Dy(Fe1−xCox)2 compounds

Electrical resistivities of the Dy(Fe1−xCox)2 intermetallic series were measured in a wide temperature region and the residual, phonon and magnetic contributions to the resistivities across the series were determined. The magnetic ordering temperatures were estimated for the Dy(Fe1−xCox)2 compounds using the magnetic contribution to the electrical resistivity. The splitting energies between the 3d subbands of iron for the Dy(Fe1−xCox)2 series were estimated using the magnetic hyperfine fields at 57Fe nuclei. The Curie temperatures obtained for the Dy(Fe1−xCox)2 intermetallics and the Curie temperatures reported in the literature for the Dy(Mn1−xFex)2 and Dy(Mn0.4−xAlxFe0.6)2 series correlate linearly with the squared energy splitting between the 3d subbands.