Crystalline structure and dielectric properties of multiferroic Cr-doped YMnO₃

YMn_0.9Cr_0.1O₃ polycrystalline material was synthesized by conventional solid-state reaction method. The crystalline structure and dielectric properties of YMn_0.9Cr_0.1O₃ were investigated. YMn_0.9Cr_0.1O₃ ceramic is proved to be a hexagonal structure with P6₃cm space group by the X-ray diffraction. The temperature dependence of dielectric constant and loss curves indicate YMnO₃ and YMn_0.9Cr_0.1O₃ samples exhibit an obvious dielectric relaxation behavior at low temperature range. The frequency dependence of dielectric loss peak follows an Arrhenius law. The XPS analysis suggest that the increase in valence compensation and the decrease in oxide vacancy compensation cause lower dielectric constant in the Cr doped YMn_0.9Cr_0.1O₃ sample.