EVOLUTION OF THE 4f ELECTRON LOCALIZATION FROM YbRh₂ Si₂ to YbRh₂ Pb STUDIED BY ELECTRON SPIN RESONANCE
Ivanshin V.A., Litvinova T.O., Ivanshin N.A., Poppl A., Sokolov D.A., Aronson M.C.

Received: November 4, 2013

DOI: 10.7868/S0044451014050097

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We report electron spin resonance (ESR) experiments on the Heusler alloy YbRh₂ Pb and compare its spin dynamics with that of several other Yb-based intermetallics. A detailed analysis of the derived ESR parameters indicates the extremely weak hybridization, more localized distribution of the 4f states, and a smaller RKKY interaction in YbRh₂ Pb. These findings reveal the important interplay between hybridization effects, chemical substitution, and crystalline electric field interactions that determines the ground state properties of strongly correlated electron systems.