Mossbauer Spectroscopy of Antiferromagnetic Fluctuations in Heavy Fermion CePdSn

Sn-119 Mossbauer spectroscopy was used to study the transition from single-ion Kondo behavior in the magnetically ordered state in the heavy-fermion intermetallic CePdSn. Found that the temperature evolution of the experimental spectra agrees with the calculations within the two-level relaxation model. This allows one to treat magnetic structure of CePdSn as the decomposition of the total volume of the CePdSn sample into the antiferromagnetic domains The temperature dependence of the frequency of fluctuations of the domain's magnetization and the distribution density of itinerant electrons near the tin atoms in the process of RKKY interaction are investigated.