The Impact of Composite Effect on Dielectric Constant and Tunability in Ferroelectric–Dielectric System

Abstract

A theoretical study was carried out to analyze the impact of composite effect on dielectric constant and tunability in the ferroelectric–dielectric system. Models of Ba0.5Sr0.5TiO3–Mg2TiO4, Ba0.45Sr0.55TiO3–MgO and Ba0.5Sr0.5TiO3–MgO–Mg2SiO4 system were constructed. The corresponding dielectric constant, tunability, and electric field distribution were obtained from the finite element analysis and the connections between these parameters were analyzed. The effects of the relative relationship between the dielectric constant of ferroelectric and dielectric on the whole dielectric properties were also analyzed by constructing a series of models with different dielectrics.

Reply to Comment on “The Impact of Composite Effect on Dielectric Constant and Tunability in Ferroelectric‐Dielectric System”

“…3 The simulation results exhibit that, with the increase in dielectric content from 0 to 10 vol%, the tunability increases gradually. 3 The simulation results exhibit that, with the increase in dielectric content from 0 to 10 vol%, the tunability increases gradually.…”

“…In the article "The Impact of Composite Effect on Dielectric Constant and Tunability in Ferroelectric-Dielectric System", two groups of 3D models have been built with different shape of dielectric particles. 3 The simulation results exhibit that, with the increase in dielectric content from 0 to 10 vol%, the tunability increases gradually. 3 These 3D models are capable of describing the practical ferroelectric-dielectric composite with few dielectric particles (less than 10 vol %).…”

“…3 The simulation results exhibit that, with the increase in dielectric content from 0 to 10 vol%, the tunability increases gradually. 3 These 3D models are capable of describing the practical ferroelectric-dielectric composite with few dielectric particles (less than 10 vol %). Moreover, in the articles of Tagantsev, Sherman, and Kolpakov et al, with the similar 3D model, the abnormal increase in tunability can both be observed in analytical results and numerical results.…”

“…In this comment, 1 with the increase in dielectric content, the abnormal increase in tunability could be observed in 2D simulation result, which is consistent with our simulation result. 2,3 However, in their 3D simulation result, with the increase in dielectric content, the tunability decreased monotonously. 1,4 I cannot agree with this result: in my recent work, an abnormal increase in tunability can also be observed in 3D ferroelectric-dielectric model.…”

“…The material parameters are based on the Ba 0.5 Sr 0.5 TiO 3 -Mg 2 TiO 4 system in our previous work. 2,3 Figure 2 shows the model with 10 vol% dielectric. The red particles are Ba 0.5 Sr 0.5 TiO 3 and the white ones are Mg 2 TiO 4.…”