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Zusammenfassung:
We investigated the magnetic properties of the two compounds YbCo4Ge2 and YbNi5Ge3 by means of magnetic susceptibility χ , specific heat C p and electrical resistivity ρ measurements down to 0.5 K. Our results show that both compounds present a rather well localized, trivalent Yb state which undergoes a transition into an antiferromagnetic state at View the MathML sourceTN=2.7K (YbNi5Ge3) and View the MathML sourceTN=2.5K (YbCo4Ge2), respectively.