Abstract
Zero, longitudinal, and transverse field μSR data are reported for CeRhSband La0.1Ce0.9RhSbdown to 45 mK. The muon spin relaxation at temperatures above a few Kelvin is caused by nuclear dipoles. Only at lower temperatures the additional depolarizing effect of electronic moments is observable, signalizing the onset of magnetic correlations in the 4f moment system. These findings are compared to the corresponding data on CeNiSn, showing that the ground state properties are basically alike in the two materials, that is, magnetic correlations develop, but remain weakly dynamic and long range antiferromagnetic order does not set in. The results for La0.1Ce0.9RhSbdiffer little from those of pure CeRhSb, indicating that the magnetic ground state properties as seen by μSR have not been altered significantly. The muonic Knight shift in CeRhSb exhibits similar features as the bulk susceptibility in the temperature range between 20 and 2 K.
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