Dielectric Properties in TbFeO₃ Ceramics

Polycrystalline sample of TbFeO₃ has been made by the traditional solid state reaction method. The sample exhibits single phase orthorhombic structure with space group Pbnm. The temperature dependences of the dielectric constant and loss tangent at different frequencies have been investigated in detail. Two strong relaxations have been observed in the investigated frequency range. The high- and low-temperature relaxations with activation energies of 0.31 and 0.32 eV may be ascribed to oxygen vacancy and the electrons hopping between Fe²⁺ and Fe³⁺ ions, respectively.