Metamagnetism in itinerant ferromagnetic CeCrGe3 Kondo system

摘要

Magneto-resistance (MR), isothermal magnetization M (H) and specific heat (C-P) of heavy fermion, dense Kondo and itinerant ferromagnetic compound CeCrGe3 (T-C similar to 70 K) at low temperatures and high magnetic fields is being reported. Phase purity and elemental analysis were done by XRD and EDX. Electrical resistivity, rho(T) vs. field H curves show hysteresis above 5 T and below 15 K. Hystersis was also observed in the M vs. H curves. This hysteresis in MR and M (H) is attributed to the magnetic field induced metamagnetism. The metamagnetism in CeCrGe3 occurs probably due to the peculiar density of states (DOS) with the Kondo resonance peak and the enhancement of DOS at the Fermi level as a result of the partial Kondo breakdown.