Evolution of the heavy fermion state in Ce2IrIn8
نویسنده
چکیده
We report μSR Knight shift and susceptibility studies for 1 T applied field along the crystalline cand a-axes of the heavy fermion compound Ce2IrIn8. Below a characteristic temperature T ∗ one observes a ‘Knight-shift anomaly’ in which the Knight shift constant K no longer scales linearly with χ. This anomaly is consistent with a scaling law in which the susceptibility χ is composed of a high-temperature component corresponding to non-interacting local moments and a low-temperature component χcf ∼ (1 − T/T ∗) ln(T ∗/T ) which characterizes the heavy-electron state below T ∗. We find that T ∗ is anisotropic, with T ∗ a = 59(3) K and T ∗ c = 24(1) K, and derive the magnitudes of χ cf .
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