Evolution of the heavy fermion state in Ce2IrIn8

Details Evolution of the heavy fermion state in Ce2IrIn8 Evolution of the heavy fermion state in Ce2IrIn8

2005-08-29

arxiv.org/abs/cond-mat/0508706v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures, Submitted to 10th International Conference on Muon Spin Rotation, Relaxation and Resonance, Oxford, UK, Au

Scientific paper

10.1016/j.physb.2005.11.048

We report muon spin rotation Knight shift and susceptibility studies for 1 T applied field along the crystalline c- and 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 susceptibility chi. This anomaly is consistent with a scaling law in which chi is composed of a high-temperature component corresponding to non-interacting local moments and a low-temperature component chi_cf proportional to (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 chi_cf for H along the a- and c-axes.

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