Magnetic properties induced by the Yb-valence inhomogeneity in the layered Kondo-lattice compound Yb4RuGe8

Abstract

Abstract We have successfully grown single crystals of a novel ytterbium-based layered compound Y b 4 R u G e 8 and studied its structural, magnetic, thermal, and transport properties. The magnetic susceptibility has a broad peak caused by the Kondo effect at approximately 40   K and is enhanced below 15   K owing to the development of additional magnetic correlations. An analysis with the grand-Kadowaki–Woods relation reveals that the low-temperature state except for the effect of the additional magnetic correlations is a heavy-mass Fermi liquid.