PALENZONA A.

A new family of the noble metal-actinide intermetallics was investigated. The electrical resistivity and magnetic susceptibility measurements on some pseudobinary phases in the U14Au51Th14Au51 system are reported. The effects of the observed competition between strong antiferromagnetic coupling and itinerant. Kondo-like 5f states are discussed.

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The heat capacities of three Ca compounds, namely CaSi2, Ca3Si4 and Ca14Si19 were measured in the 3-300 K temperature range by adiabatic calorimetry. No thermal anomalies were found in the whole temperature range. La the three Ca Silicides. from an analysis of the low temperature data (T<40 K), a power law lower than three in the lattice heat...

Electrical resistivity (4.2-300 K range) and magnetization measurements (4.2-300 K and 0-1 T) were performed on GdNiGa, TiNiSi type. Onset of ferromagnetism is observed at T-c=30.5 K, with a magnetic moment saturation value (H=1 T) at 4.2 K of 7.2 mu(B). A Curie-Weiss like behaviour is observed above T-c, with a paramagnetic Curie temperature...

The low-temperature heat capacities of the two ternary intermetallic compounds GdNiGa and GdNiIn, which order ferromagnetically at 30.5 and 93.5 K respectively, were measured as a function of the magnetic field up to 9 tesla. From the experimental data the isothermal magnetic entropy change (Delta S-magn) and the adiabatic temperature raise...