title: Local magnetism of isolated Mo atoms at substitutional and interstitial sites in Yb metal: experiment and theory
abstract: We have observed large 4d moments on isolated Mo atoms at substitutional and octahedral interstitial lattice sites in Yb metal, showing Curie-Weiss local susceptibility and a Korringa-like spin relaxation rate. The interstitial Mo atoms, despite strong hybridization with the Yb neighbors, show rather small Kondo temperature ( T(K)</=60 K), implying high moment stability. While magnetism of Mo at the substitutional site is consistent with Kondo-type d-sp interaction, we suggest that moment stability at the interstitial site is strongly influenced by ferromagnetic polarization of Yb-4f5d band electrons.
authors.affiliation: Department of Nuclear and Atomic Physics, T.I.F.R., Homi Bhabha Road, Mumbai-400005, India.
authors.initials: AA
authors.lastname: Tulapurkar
authors.initials: SN
authors.lastname: Mishra
authors.initials: RG
authors.lastname: Pillay
authors.initials: HG
authors.lastname: Salunke
authors.initials: GP
authors.lastname: Das
authors.initials: S
authors.lastname: Cottenier