Complementary study of heat capacity and magnetization for intermetallic YNi₂B₂C single crystal

The superconducting and magnetic properties of YNi₂B ₂C single crystal have been investigated by heat capacity and dc-magnetic methods, with magnetic field applied parallel to the c-axis, i.e., H∥(001)-direction. In the framework of heat capacity and magnetization analyses, we obtain the thermodynamic critical field H_c from both heat capacity and magnetization data. The heat capacity data deviate from predictions for both weak- and strong-coupling superconductivity, but are described relatively well in a medium-coupling analysis. The precise t ³-dependence of the electronic heat capacity C_es indicates the gap anisotropy with the presence of point nodes for YNi ₂B₂C single crystal.