We report measurements of magnetic susceptibility and specific heat for polycrystalline Ce1-xLaxCoGe2 for x=0, 0.1, 0.2, 0.3, 0.5, and 1. CeCoGe2 is considered as a concentrated J=5/2 Kondo system. We have found significant preferential orientation in the magnetic susceptibility implying magnetic anisotropy. Magnetic susceptibility and specific heat results do not corroborate the single impurity model and imply the importance of crystalline electric

Specific-heat experiments on single crystals of the S=1 quasi-one-dimensional bond-alternating antiferromagnet Ni(C9H24N4)(NO2)ClO4 (NTENP) have been performed in magnetic fields applied both parallel and perpendicular to the spin chains. We have found for the parallel field configuration that the magnetic specific heat (Cmag) is proportional to temperature (T) above a critical field Hc, at which the energy gap vanishes, in a temperature region above

Specific heat in magnetic fields to 14 T, magnetic susceptibility and electrical resistivity for single crystalline samples of Ce1–xLaxOs4Sb12 (x=0,0.02,0.1) are reported. The results of the magnetic susceptibility and electrical resistivity are consistent with a formation of the hybridization gap below 100 K in all investigated alloys. We argue for the intrinsic origin of a large electronic specific heat coefficient and 1.1 K anomaly. The low

We report the low-temperature susceptibility and specific heat for single crystals of Pr1−xLaxOs4Sb12 (0⩽x⩽1). The ionic properties of the material, characterized by the energy spectrum of crystalline electric field (CEF) levels of Pr, are unchanged by La doping. The average Tc is only weakly affected by La substitution and varies approximately linearly between the end compounds. The discontinuity in the specific heat divided by temperature

The specific heat of UCd11 was measured in magnetic fields to 27 T. Besides the antiferromagnetic transition, there is a second transition that can be clearly resolved in fields between 14 and 20 T. This second transition (at Tm) extrapolates to a broad shoulder in C/T in zero field. The two lines of transitions cross somewhere between 20 and 23 T. Tm displays unusually weak dependence on the strength of the magnetic field. Our results argue for

Specific heat for U1−xYxRu2Si2 alloys, with 0less-than-or-equals, slantxless-than-or-equals, slant0.5, is reported. All studied alloys showed an anomaly at a temperature Tm. Tm is rapidly reduced with x for small x (less-than-or-equals, slant0.02), increases for x=0.05, and is only weakly x-dependent for larger concentrations. This and other low temperature characteristics are consistent with the existence of two-ordered phases.

Electrical resistivity of PrOs4Sb12 was measured at temperatures down to 20 mK and in fields to 18 T. The resistivity is dominated by low-energy crystalline electric-field effects. Our analysis of the resistivity in magnetic fields provides a support for the heavy fermion state

The magnetic phase diagram of PrOs4Sb12 has been investigated by specific heat measurements between 8 and 32 T. A new Schottky anomaly, due to excitations between two lowest crystalline-electric-field (CEF) singlets, has been found for both H||(100) and H||(110) above the field where the field-induced ordered phase (FIOP) is suppressed. The constructed H–T phase diagram shows weak magnetic anisotropy and implies a crossing of the two CEF levels