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Single-crystals of the heavy-electron compound U2Pt2 In have grown by a modified mineralization technique.The X-ray structure refinement shows that U2Pt2In single-crystals form in the Zr3Al2 structure, instead of the U3Si2 structure reported for polycrystalline material. The polymorphism of U2Pt2In is attributed to the experimental parameters, like pressure and temperature, during the sample preparation process. The single-crystal susceptibility data reveal a weak maximum for Xc at Tmax=7.9 K, indicating the presence of short-range antiferromagnetic correlations, while Xa has the tendency to diverge at low T (T>2 K). The electrical resistivity of the single-crystals (T>0.3K) is best described by p ~ Ta with a ~ 1.1(1) for I11a and a~0.3(2) for I11c.The magnetic and transport data show pronounced deviations from the standard Fermi-liquid picture, and lead to a classification of U2Pt2In a non-Fermi liquid compound. As the origin of NFL behaviour in U2Pt2In we propose the proximity to a quantum critical point or Kondo disorder.

Additional information

Authors: ESTRELA P, University of Amsterdam (NL);DE VISSER A, University of Amsterdam (NL);DE BOER F R, University of Amsterdam (NL);PEREILA L C J, Institute of Technologico e Nuclear, Sacavem (PL);ALMEIDA M, Institute of Technologico e Nuclear, Sacavem (PL);GODINHO M, University of Lisbon (PL);REBIZANT J, Institute for Transuranium Elements (DE);SPIRLAT J C, Institute for Transuranium Elements (DE)
Bibliographic Reference: Article: Journal of Physics Condensed Matter, 1998
Record Number: 199910213 / Last updated on: 1999-03-12
Original language: en
Available languages: en