From ferromagnetic to non-magnetic singlet ground state in CePd1-xNix

NIEVA, G.L.; SERENI, J.G.; AFYOUNI, M.; SCHMERBER, G.; KAPPLER, J.P.

Z. PHYS. - B - COM. MAT.

Springer-Verlag

Año: 1988 vol. 70 p. 181 - 186

0722-3277

Magnetic, resistivity and specific heat measurements were performed on the CePd1-xNix system, which ranges between a ferromagnetic (CePd) and non-magnetic (CeNi) singlet ground state. The Curie temperature (Tc) grows with Ni concentration, reaching a maximum value of Tc=(10.5±0.1) K for 0.5≤x≤0.8. Both, the concentration dependence of Tc and the Curie-Weiss temperature (θP) follow the predicted competition between the magnetic exchange interactions and the Kondo effect. In the crossover region (x≅0.9) the entropy gain shows that only the doublet crystal field ground state is involved in the singlet ground state formation. © 1988 Springer-Verlag.