Field-dependent response of the heavy Fermi-liquid ground state in YbNi2B2C

We measured the specific heat of YbNi2B2C in applied fields up to 18 T. As the magnetic field is increased, the peak in the specific heat associated w ith the Kondo anomaly moved to higher temperatures. This behavior is consis tent with theoretical predictions, and a semi-quantitative description of t his continuous evolution of the specific heat is presented. Previously, the magnetoresistance of this system was measured, and a comparison is made be tween field-dependent response of the thermodynamic and transport propertie s of YbNi2B2C. (C) 1999 Elsevier Science B.V. All rights reserved.