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The cubic intermetallic compound Sm    3Co    4Ge    13(space groupP m  3 ¯  n    ) possesses a cage-like structure composed of Ge and displays an antiferromagnetic transition atT N  ≈6 K in magnetization,M ( T )    , specific heat,C p   ( T )and in thermal conductivity,κ ( T ). The magnetic transition atT Nis observed to be robust against applied magnetic fields up to 9 T. From the analysis of specific heat, a Sommerfeld coefficient    γ    = 80(2) mJ/mol-Sm K    2is estimated. The magnetic entropy released atT Nis estimated as lower than that of a doublet, R ln(2). A positive Seebeck coefficient is observed for the thermopower,S ( T )   . Photoemission spectroscopy reveals distinct electronic character of the near-E Fvalence band states arising out of Co(   3 d)-Sm(   4 f) hybridization and Sm(   4 f) electron correlation. The unusual field-independent features in magnetization, specific heat and electrical transport is an indication of the significant correlation between f and d wave functions.

Field-Independent Features in the Magnetization and Specific Heat of Sm3Co4Ge13