Reentrant Phenomenon in Barium Titanate Zirconate-Based Relaxor Ferroelectrics.

ABSTRACT: Reentrant phenomena are rare occurrences in relaxor ferroelectrics, and their underlying mechanisms are still unknown. In this paper, we report on the reentrant relaxor behavior in the perovskite system (1 - x)Ba(Ti_0.85Zr_0.15)O₃-xBi(Zn_2/3Nb_1/3)O₃ with x  = 0, 0.015, 0.02, 0.04, 0.06, and 0.15. For all compositions, the temperature dependences of the dielectric permittivity exhibit characteristic reentrant features: a frequency-independent maximum ≈ 340 K (T_m) associated with the ferroelectric phase transition, and a frequency-dependent anomaly (T_R) at lower temperatures indicating relaxor behavior. Raman spectroscopy shows that the correlation length of the B-cation displacements is suppressed by doping

SUBMITTER: Kroll E 

PROVIDER: S-EPMC12410908 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature