Abstract
High-field-magnetization, magnetic-susceptibility, specific-heat, electrical-resistivity, lattice-parameter, x-ray absorption spectroscopy, and x-ray-absorption near-edge spectroscopy measurements are discussed for Ce() (M=Ni, Rh, and Ag) pseudoternary alloys. The Pd substitution by a holelike metal (Ni and Rh) induces the demagnetization of the Ce atom by two different mechanisms: electronic concentration variation (ΔZ, for M=Rh) and volume reduction (ΔV, for M=Ni). The Pd substitution by an electronlike metal (Ag) induces drastic changes in the magnetic structure with only a 2 at. % impurity. The experimental results indicate: (i) a continuous transformation from a ferromagnetic (F) to a nonmagnetic (NM) ground state induced by the ΔZ variation and (ii) a drastic transformation from F to NM, by the ΔV change at a certain critical concentration. The ferromagnetic-to-antiferromagnetic transition induced by Ag is described as due to the variation of the charge screening at the nonmagnetic site.
- Received 1 March 1993
DOI:https://doi.org/10.1103/PhysRevB.48.3747
©1993 American Physical Society