Magnetic, electronic and thermodynamic properties of the heavy fermion compound CeNiAl4

作者：Kowalczyk A; Tolinski T^*; Szewczyk A; Gutowska M; Tran V H; Chelkowska G

来源：Intermetallics, 2009, 17(8): 603-606.

DOI：10.1016/j.intermet.2009.01.016

• Magnetic intermetallics
• Electronic structure of metals and alloys
• Magnetic properties
• Thermal properties
• Thermoelectric properties

We have carried out the magnetic susceptibility, electrical resistivity, specific heat, thermoelectric power and X-ray photoemission spectroscopy (XPS) measurements for CeNiAl4. The magnetic susceptibilities have revealed a Curie-Weiss behavior above 30 K with a large negative paramagnetic Curie temperature theta(p)= -66 K and an effective moment of 2.45 mu B. The f-occupancy and the coupling between the f level and the conduction states are derived from XPS to be about 0.83 and similar to 40-64 meV, respectively. The valence state of the Ce ion is close to 3 . Extrapolation of the lowest temperatures range of C/T(T-2) yields the electronic specific heat coefficient gamma = 0.5 J mol(-1) K-2. In combination with the thermoelectric power and resistivity data, a heavy fermion state is confirmed in CeNiAl4.

• 出版日期2009-8