CRYSTALLOGRAPHIC, FERROELECTRIC AND ELECTRONIC PROPERTIES OF THE Sr₂ZrTiO₆ DOUBLE PEROVSKITE

Abstract

In this paper, we report structural analysis, ferroelectric behavior and electronic structure of Sr 2 ZrTiO 6 double perovskite. Samples were produced by the solid state reaction recipe. Crystallographic analysis was performed by Rietveld refinement of experimental X-ray diffraction patterns. Results show that this material crystallizes in a tetragonal perovskite structure which corresponds to the space group I4/m. The curve of polarization as a function of applied voltage evidences a ferroelectric character with saturation polarization on the application of voltages up to 1800 V. Calculations of density of states and band structure for this manganite-like material were carried out by means of the density functional theory implemented into the Wien2k code. Results of total and partial density of states reveal the insulator character of this material with an energy gap of 2.66 eV.

Synthesis and piezoelectric properties of (1 −x)Bi0.5(Na0.8K0.2)0.5TiO3–xSr2ZrTiO6ceramics

“…It was found that the formation of MPB in the (1 − x)BNKT-xBa 2 ZnWO 6 system allows further enhancement of ferroelectric and piezoelectric properties (d 33 = 168 pC=N at x = 0.05). 24) In addition, Sr 2 ZrTiO 6 (SZT) 25) is also known as a double perovskite structure with a space group of I4=m and shows ferroelectric behavior, although ST and SZ show the paraelectric phases. Therefore, in order to clarify the influences of ferroelectric phase SZT addition on the piezoelectric properties, (1 − x)BNKT-xSZT ceramics were synthesized and the compositional dependence of piezoelectric properties was characterized in this study.…”