Kondo resonance energies in CePd3.

Abstract

We have determined characteristic Kondo energies of the $^{2}$${\mathit{F}}_{5/2}$ and $^{2}$${\mathit{F}}_{7/2}$ spin-orbit states of Ce in the compound ${\mathrm{CePd}}_{3}$ using epithermal neutrons. They are \ensuremath{\sim}50 and \ensuremath{\sim}90 meV, respectively. Kramers-Kronig and moment sum-rule integrals together help to ascertain that the low-temperature magnetic response for the ground state ${(}^{2}$${\mathit{F}}_{5/2}$) is closely (and almost wholly) represented by a single-ion spectral form with the characteristic energy of \ensuremath{\sim}50 meV. Additional or deviational low-energy magnetic scattering (at energies above \ensuremath{\sim}2 meV) which could be associated with possible low-temperature coherence or other phenomena is estimated to be at a level below \ensuremath{\sim}2% of the integrated single-ion spectral intensity. \textcopyright{} 1996 The American Physical Society.