A succession of relaxor ferroelectric transitions coexisting with ferroelectric states in Ba_0.55Sr_0.45TiO_3

TL;DR

This study investigates the complex phase transitions in Ba_0.55Sr_0.45TiO_3, revealing multiple relaxor ferroelectric transitions coexisting with ferroelectric states through dielectric and X-ray diffraction analyses.

Contribution

It provides detailed characterization of phase transitions and coexistence of relaxor and ferroelectric behaviors in Ba_0.55Sr_0.45TiO_3, expanding understanding of its ferroelectric properties.

Findings

Identification of three relaxor ferroelectric transitions

Confirmation of phase transitions via XRD

Coexistence of relaxor and ferroelectric behaviors

Abstract

We present here the results of frequency dependent dielectric, polarization and powder X-ray powder diffraction studies in the 300 to 100K temperature range for Ba_0.55Sr_0.45TiO_3. The dielectric results indicate a succession of three relaxor ferroelectric transitions accompanying the cubic to tetragonal to orthorhombic to rhombohedral phase transitions confirmed by XRD studies. Our results confirm the coexistence of the relaxor ferroelectric and ferroelectric behaviours.