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We report on the structural, thermodynamic and transport properties ofhigh-quality single crystals of YbNiSi3 grown by the flux method. This compoundcrystallizes in the SmNiGe3 layered structure type of the Cmmm space group. Thegeneral physical behavior is that of a Kondo lattice showing anantiferromagnetic ground state below T_N = 5.1 K. This is among the highestordering temperatures for a Yb-based intermetallic, indicating strong exchangeinteraction between the Yb ions, which are close to +3 valency based on theeffective moment of 4.45 mu_B/f.u. The compound has moderately heavy-electronbehavior with Sommerfeld coefficient 190 mJ/mol K^2. Resistivity is highlyanisotropic and exhibits the signature logarithmic increase below a localminimum, followed by a sharp decrease in the coherent/magnetically orderedstate, resulting in residual resistivity of 1.5 micro Ohm cm and RRR = 40.Fermi-liquid behavior consistent with a ground-state doublet is clearlyobserved below 1 K.Comment: 4 pages, 4 figures, submitted to PR

physical review. b, condensed matter and materials physics

<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Yb</mml:mi><mml:mi mathvariant="normal">Ni</mml:mi><mml:msub><mml:mi mathvariant="normal">Si</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>: An antiferromagnetic Kondo lattice with strong exchange interaction

YbNiSi3: An antiferromagnetic Kondo lattice with strong exchange interaction