Large 4d spin magnetic moments with small spin fluctuation rates have been measured for isolated Rh impurities in paramagnetic dilute PdFe alloys using the time-differential perturbed-angular-correlation method. The Curie-Weiss–like local susceptibility reflects enhanced Rh moment stability with the small addition of Fe into the Pd host, indicated by a drastic reduction of the spin fluctuation temperature. We suggest that magnetism and moment stability of Rh in the PdFe system are mainly governed by an interatomic ferromagnetic exchange interaction between the Rh 4d and the Pd d-band electrons.

• Received 12 August 1991

DOI:https://doi.org/10.1103/PhysRevLett.68.1038