Dielectric behavior of (1 − x) Ba Zr0.025Ti0.975O3–(x) BiFeO3 solid solutions

Barium zirconate titanate is a very promising material having good ferroelectric properties while bismuth ferrite is a well known multiferroic material. In the present work, the compounds (1 − x) Ba Zr0.025Ti0.975O3–(x) BiFeO3 (x = 0.1–0.4) have been synthesized using solid state reaction method and structural analysis reveal the formation of single phase solid solution. Initially, the Curie temperature increases with increasing bismuth ferrite up to x = 0.2 and with the further increase in bismuth ferrite content, the Curie temperature decreases. There is an increase in the value of dielectric constant at 1 kHz from 551 for x = 0.1 to 3509 for x = 0.4 at their Curie temperatures. The values of coercive field decrease with the increasing bismuth ferrite content resulting in slim ferroelectric loops which confirms the formation of relaxor multiferroics.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The compositions (1 − x) BZT-x BFO (x = 0.1–0.4) have been synthesized using SSR. ► The samples showed Relaxor behavior with the increasing concentration of BFO. ► Single phase at higher conc. of BFO has been justified through Defect Equation. ► The relaxor behavior has been supported by the slim ferroelectric loops.