Effect of Pressure on the Supereondueting Properties of YNi₂B₂C

抄録

Electrical resistance of YNi₂B₂C has been measured at high pressure and magnetic field. The pressure dependence of lattice parameters was also measured up to 12 GPa at room temperature. It is found that the upper critical field H_c2 decreases slightly by applying pressure and a small anisotropy is observed in the lattice compression. The compressibilities along a- and c-axis are obtained to be K_a=1. 8×10^-3 GPa^-1 and K_c=2. 2×10^-3 GPa^-1, respectively. The present results are compared with those of other borocarbides.