4 research outputs found
Heat Capacity Studies of NdNi 4
The study of the heat capacity of the intermetallic compound including the effect of the magnetic field is reported. This compound crystallizes in the hexagonal -type structure, space group P6/mmm. is ferromagnetic with = 8 K and the saturation magnetic moment of 1.5 /f.u. at 4.2 K (in H = 9 T). The heat capacity was analyzed considering the electronic contribution, the Schottky anomaly, and the lattice contributions in the frames of the Debye model. The scheme of the energy levels created by the crystal electric field split is determined from the Schottky contribution to the specific heat. was characterized by the electronic heat capacity coefficient γ = 85 mJ/(mol ) and the Debye temperature = 325 K
Heat Capacity Studies of Compound
The study of the heat capacity of the intermetallic compound including the effect of the magnetic field is reported. This compound crystallizes in the hexagonal -type structure, space group P6/mmm. is ferromagnetic with = 8 K and the saturation magnetic moment of 1.5 /f.u. at 4.2 K (in H = 9 T). The heat capacity was analyzed considering the electronic contribution, the Schottky anomaly, and the lattice contributions in the frames of the Debye model. The scheme of the energy levels created by the crystal electric field split is determined from the Schottky contribution to the specific heat. was characterized by the electronic heat capacity coefficient γ = 85 mJ/(mol ) and the Debye temperature = 325 K
Heat Capacity of Heavy Fermion Compound in High Magnetic Fields
The heat capacity in the applied magnetic field up to 9 T, susceptibility and magnetization of polycrystalline are presented. Magnetic ordering was not observed down to 2 K. For temperature T < 200 K a Curie-Weiss behavior is observable giving an effective magnetic moment =2.53 /f.u. The experimental value of is close to the calculated one for a free ion ( = 2.54 /f.u.), thus indicating the presence of well localized magnetic moments carried by the stable ions. At low temperatures the electronic heat capacity coefficient value depends strongly on the temperature range used for the extrapolation and applied magnetic field. We observe a typical heavy fermion behavior with γ value of about 380 mJ obtained from extrapolation to T = 0 K of the temperature range above 7 K. However, extrapolation of the lowest temperatures range yields the γ value of 3.3 J