Anisotropic thermal expansion and magnetostriction of YNi${}_2$B${}_2$C single crystals

Abstract

We present results of anisotropic thermal expansion and low temperature magnetostriction measurements on YNi${}_2$B${}_2$C single crystals grown by high temperature flux and floating zone techniques. Quantum oscillations of magnetostriction were observed at low temperatures for $H\Vert c$ starting at fields significantly below $H_{c2}$ ($H<0.7H_{c2}$). Large irreversible, longitudinal magnetostriction was seen in both, in-plane and along the c-axis, directions of the applied magnetic field in the intermediate superconducting state. Anisotropic uniaxial pressure dependencies of $T_c$ were evaluated using results of zero field, thermal expansion measurements.

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