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Published on: October 5, 2013
On the Ytterbium Valence and the Physical Properties in Selected Intermetallic Phases
Stefan Engel1, Elias C J Gießelmann1, Maximilian K Reimann2
1Anorganische Festkörperchemie Universität des Saarlandes, Campus C4.1 66123 Saarbrücken, Germany.
Abstract:
The present review summarizes important aspects of the crystal chemistry of ytterbium-based intermetallic compounds along with a selection of their outstanding physical properties. These originate in many cases from the ytterbium valence. Different valence states are possible here, divalent (4f14), intermediate-valent, or trivalent (4f13) ytterbium, resulting in simple diamagnetic, Pauli or Curie-Weiss paramagnetic, or valence fluctuating behavior. Especially, some of the Yb3+ intermetallics have gained deep interest due to their Kondo or heavy Fermion ground states. We have summarized their property investigations using magnetic and transport measurements, specific heat data, NMR, ESR, and Mössbauer spectroscopy, elastic and inelastic neutron scattering, and XAS data as well as detailed thermoelectric measurements.
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