Ferroelectricity

Structural and dielectric properties of Bi$_3$Ti$_{1.5}$W$_{0.5}$O$_9$

S. V. Zubkov^a, I. A. Parinov^b, Yu. A. Kuprina^a, A. V. Nazarenko<sup>c

a</sup> Research Institute of Physics, Southern Federal University, Rostov-on-Don, Russia
^b Institute of Mathematics, Mechanics and Computer Sciences, Southern Federal University, Rostov-on-Don, Russia
^c Southern Research Center of the Russian Academy of Sciences, Rostov-on-Don, Russia

Abstract: Layered perovskite-like oxide Bi$_3$Ti$_{1.5}$W$_{0.5}$O$_9$ has been synthesized by the method of high-temperature solid-state reaction. The X-ray diffraction study showed that the compound is single-phase and has the structure of the family of Aurivillius phases (AP) with parameters close to the orthorhombic unit cell corresponding to the space group $A2_1am$. The temperature dependences of the relative permittivity $\varepsilon/\varepsilon_0$ and the loss tangent $\operatorname{tg}\sigma$ are measured at different frequencies. For the synthesized compound, the piezoelectric modulus $d_{33}$ was measured. The microstructure of Bi$_3$Ti$_{1.5}$W$_{0.5}$O$_9$ has been obtained.

Keywords: Aurivillius phases, Bi$_3$Ti$_{1.5}$W$_{0.5}$O$_9$, activation energy $E_a$, Curie temperature $T_C$, piezoelectric modulus $d_{33}$.

Received: 31.01.2022
Revised: 02.02.2022
Accepted: 03.02.2022

DOI: 10.21883/FTT.2022.06.52390.284

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