Muon spin relaxation and nonmagnetic Kondo state in PrInAg2

Muon spin relaxation experiments have been carried out in the Kondo compound PrInAg2. The zero-field muon relaxation rate is found to be independent of temperature between 0.1 and 10 K, which rules out a magnetic origin (spin freezing or a conventional Kondo effect) for the previously observed specific-heat anomaly at ∼0.5 K. At low temperatures the muon relaxation can be quantitatively understood in terms of the muon’s interaction with nuclear …