# Structure and dielectric properties of Ba$_2$Cu$_x$Y$_{1-x}$TaO$_{6-y}$ double perovskite

## TL;DR

This study investigates how Cu doping affects the structure and dielectric properties of Ba$_2$Y$_{1-x}$Cu$_x$TaO$_{6-y}$ ceramics, revealing structural modifications and enhanced dielectric behavior due to interfacial polarization.

## Contribution

It presents new insights into Cu doping effects on the structural and dielectric properties of Ba$_2$YTaO$_6$ ceramics, including reduced sintering temperature and improved dielectric constant.

## Key findings

- Cu doping reduces sintering temperature.
- Structural changes in the crystalline structure.
- Enhanced dielectric constant due to interfacial polarization.

## Abstract

In this paper, we reported the effect of Cu doping on the structural and dielectric properties of Ba$_2$Y$_{1-x}$Cu$_x$TaO$_{6-y}$ (0.00 $\leq$ x $\leq$ 0.50) ceramics at room temperature. The Copper for Yttrium substitution reduces the sintering temperature and leads to structural changes in the Ba$_2$YTaO$_6$ rock-salt crystalline structure. Dielectric permittivity and complex impedance spectroscopy measurements suggested enhancement of the dielectric constant and occurrence of interfacial Maxwell-Wagner polarization.