Kondo-like effect in antiferromagnetic gamma -Fe-Mn-Ge alloys at low temperature

摘要: The temperature T dependence of the magnetic susceptibility chi and electrical resistivity rho gamma -Fe-31 at.% Mn alloys containing 2-8.7 Ge 5.2 Cr were measured in detail over range 5-500 K. Neel transition these accompanied by an anomalous change has been observed at a 300-430 In lowering to about 5 K, no second anomaly for or Mn-5.2 was found, but secondary minimum below 50 K Mn-Ge alloys. Tmin increases proportion concentration, from Fe-Mn-Ge can be plotted as linear function log T, T2 square root T. These results suggest that antiferromagnetic -Fe-Mn-Ge is due Kondo-like effect caused localized moments on Fe atom sites which are induced enhanced solution -Fe-Mn