High-Pressure, High-Temperature Synthesis and Characterization of Polar and Magnetic LuCrWO₆

A new polar and magnetic oxide, LuCrWO₆, was synthesized under high pressure (6 GPa) and high temperature (1673 K). LuCrWO₆ is isostructural with the previously reported polar YCrWO₆ (SG: Pna2₁, no. 33). The ordering of CrO₆ and WO₆ octahedra in the edge-shared dimers induce the polar structure. The effective size of rare earth, Ln cation does not seem to affect the symmetry of LnCrWO₆. Second harmonic generation measurements of LuCrWO₆ confirmed the noncentrosymmetric character and strong piezoelectric domains are observed from piezoresponse force microscopy at room temperature. LuCrWO₆ exhibits antiferromagnetic behavior, T_N, of ∼18 K with a Weiss temperature of -30.7 K.