Local magnetism of isolated Mo atoms at substitutional and interstitial sites in Yb metal: experiment and theory
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.
Tulapurkar
AA
Department of Nuclear and Atomic Physics, T.I.F.R., Homi Bhabha Road, Mumbai-400005, India.
Mishra
SN
Pillay
RG
Salunke
HG
Das
GP
Cottenier
S