Magnetic behavior ofCeFe2: Effects of Ru, Rh, and Pd substitutions

Results are presented for the effects of substitution of Ru, Rh, and Pd for Fe in ${\mathrm{CeFe}}_2$. For Rh and Pd the Curie temperature is lowered for up to 10% substitution without change in magnetic character. Ru substitutions produce (for 4% to 8%) the low-temperature loss of ferromagnetism observed for around 10% Co. At larger Ru substitutions no ferromagnetic regime is found but resistivity, susceptibility, and magnetization results suggest the presence of magnetic freezing which has some antiferromagnetic and some spin-glass features. These results are discussed in terms of the effects that might be produced by 4f–conduction-band hybridization, its modification by alloying and theories of the types of phase diagram that can be produced in itinerant-electron systems with competing interactions.