Anisotropy of Cr-like anomaly in U1−xCexRu2Si2

• Published in: Journal of alloys and compounds Vol. 275-277; pp. 480 - 483
• Main Authors: Maťaš, Slavomı́r, Mihalik, Marián, Arnold, Zdeněk, Kamarád, Jiřı́, Pavlı́k, Vladimı́r, Flachbart, Karol, Menovsky, Alois
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 24-07-1998
• Subjects: Heavy fermions; Pressure; Resistivity; Heavy fermions; Pressure; Resistivity
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/S0925-8388(98)00376-4

We measured electrical resistivity in U1−xCexRu2Si2 single crystals (0.00≤x≤0.050) at ambient pressure and at hydrostatic pressures up to 9 kbar. Our measurements show strong anisotropy, with the in-plain resistivity ρa much higher than ρc parallel to the c-axis. The substitution of U with Ce in URu2Si2 reduces the transition to a Kondo coherent state and the Néel temperature. The minimum in the Cr-like anomaly becomes more prominent but the characteristic shape of the anomaly vanishes. Low temperature characteristic features of URu2Si2, superconductivity and Fermi-liquid behaviour, vanish very rapidly with Ce substitution. The Néel temperature TN increases by applying hydrostatic pressure with pressure coefficients ∂TN/∂p=0.08±0.02 Kkbar−1 for x=0.00 and ∂TN/∂p=0.13±0.02 and Kkbar−1 for x=0.025.