Magnetic susceptibility of YbRh2Si2 and YbIr2Si2 on the basis of a localized 4f electron approach
نویسندگان
چکیده
We consider the local properties of the Yb ion in the crystal electric field in the Kondo lattice compounds YbRh2Si2 and YbIr2Si2. On this basis we have calculated the magnetic susceptibility taking into account the Kondo interaction in the simplest molecular field approximation. The resulting Curie-Weiss law and Van Vleck susceptibilities could be excellently fitted to experimental results in a wide temperature interval where thermodynamic and transport properties show non-Fermiliquid behaviour for these materials. PACS numbers: 75.40.Cx, 75.30.Mb, 76.30.Kg, 75.10.Dg ar X iv :0 81 0. 29 42 v1 [ co nd -m at .s tr -e l] 1 6 O ct 2 00 8 Magnetic susceptibility of YbRh2Si2 and YbIr2Si2 2
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