Novel ternary compound Ce2RuAlCe_{2}RuAl: Synthesis, crystal structure, magnetic and electrical properties

The intermetallic phase Ce2RuAl was synthesized by arc melting the elemental components and subsequent annealing of the product at 823 K. Its crystal structure was determined from the single-crystal X-ray diffraction data and confirmed by powder X-ray diffraction at room temperature. The compound is of a new structural type related to the LaF3-type of structure: space group P63cm, Z = 6, a = 7.8362(7) Å, c = 9.7510(9) Å, Pearson symbol hP24. Some Ce–Ru distances in the unit cell are unusually short being equal to 2.4821(6) Å. This structural feature brings about instability in the cerium valence state, directly evidenced in the XANES data and corroborated in the study of bulk physical behavior in Ce2RuAl

Superconductivity and non-Fermi-liquid behavior of La3Pd4Si4 and Ce3Pd4Si4.

Measurements of temperature and field dependent bulk properties have been carried out on {Ce,La}3Pd4Si4. Rietveld refinements of x-ray powder intensity data confirm the orthorhombic U3Ni4Si4-type structure for both compounds. While La3Pd3Si4 exhibits superconductivity below 2 K together with some indications of a two gap scenario, the former can be characterized as a Kondo lattice system in presence of crystalline electric field splitting. Due to the closeness of a quantum critical point, distinct non-Fermi-liquid features dominate the low temperature physics of Ce3Pd4Si4Fil: Kneidinger, . Vienna Universuty Of Technology; Austria;Fil: Michor, H.. Vienna Universuty Of Technology; Austria;Fil: Bauer, E.. Vienna Universuty Of Technology; Austria;Fil: Gribanov, A.. Moscow State University; Russia;Fil: Lipatov, A.. Moscow State University; Russia;Fil: Seropegin, Y.. Moscow State University; Russia;Fil: Sereni, Julian Gustavo Renzo. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Bajas Temperaturas; ArgentinaFil: Rogl, P.. Vienna Universuty Of Technology; Austria