Relevance of ferromagnetic correlations for the Electron Spin Resonance in Kondo lattice systems

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dc.creatorKrellner, Cornelius
dc.creatorFoerster, Tobias
dc.creatorJeevan, Hirale
dc.creatorGeibel, Christoph
dc.creatorSichelschmidt, Joerg
dc.date2008-01-08
dc.date.accessioned2026-07-07T09:33:05Z
dc.date.available2026-07-07T09:33:05Z
dc.descriptionElectron Spin Resonance (ESR) measurements of the ferromagnetic Kondo lattice system CeRuPO show a well defined ESR signal which is related to the magnetic properties of the Ce3+ moment. In contrast, no ESR signal could be observed in the antiferromagnetic homologue CeOsPO. Additionally, we detect an ESR signal in a further ferromagnetic Yb compound, YbRh, while it was absent in a number of Ce or Yb intermetallic compounds with dominant antiferromagnetic exchange, independently of the presence of a strong Kondo interaction or the proximity to a (quantum) critical point. Thus, the observation of an ESR signal in a Kondo lattice is neither specific to Yb nor to the proximity of a quantum critical point, but seems to be connected to the presence of ferromagnetic fluctuations. These conclusions not only provide a basic concept to understand the ESR in Kondo lattice systems even well below the Kondo temperature as observed in the heavy fermion metal YbRh2Si2 but point out ESR as a prime method to investigate directly the spin dynamics of the Kondo ion.
dc.description5 pages, 2 figures, 1 table
dc.identifierhttps://arxiv.org/abs/0801.1191
dc.identifierhttp://arxiv.org/abs/0801.1191
dc.identifierPhys. Rev. Lett. 100, 066401(2008)
dc.identifierdoi:10.1103/PhysRevLett.100.066401
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/159010
dc.subjectStrongly Correlated Electrons
dc.titleRelevance of ferromagnetic correlations for the Electron Spin Resonance in Kondo lattice systems
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