Local magnetism of isolated Mo atoms at substitutional and interstitial sites in Yb metal : Experiment and Theory

Details Local magnetism of isolated Mo atoms at substitutional and interstitial sites in Yb metal : Experiment and Theory Local magnetism of isolated Mo atoms at substitutional and interstitial sites in Yb metal : Experiment and Theory

2000-05-04

arxiv.org/abs/cond-mat/0005091v1

Physics

Condensed Matter

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.85.1978

Using TDPAD experiment and local spin density calculations, 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 Korringa like spin relaxation rate. As a surprising feature, despite strong hybridization with the Yb neighbours, interstitial Mo atoms show high moment stability with small Kondo temperature. While, magnetism of Mo, at substitutional site is consistent with Kondo type antiferromagnetic d-sp exchange interaction, we suggest that moment stability at the interstitial site is strongly influenced by ferromagnetic polarization of Yb-4f5d band electrons.

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