Structural, dielectric, impedance, and modulus spectroscopy of La3TiVO9 ceramic

Abstract Detailed investigations of a new member of Aurivilius family La3TiVO9, fabricated by the mixed oxide reaction method, are found to crystallize in the orthorhombic crystal system. The prepared sample has a higher value of e r ′ and lower value of tan ⁡ δ as compared to those of the reported ones of Bi3TiNbO9, and is thermally more stable. The Nyquist plots suggest the polarization from only grain contribution even up to 525 °C. The relaxor behavior and distribution of relaxation time are analyzed from the modulus spectroscopy. The nature of the field-dependent P-E hysteresis loop indicates the occurrence of ferroelectricity in the sample. Conductivity data indicate an activation energy of 0.98 eV for both DC conduction and relaxation processes and correlated barrier hopping model as the effective conduction process in the sample.