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Abstract
(1-x)BaTiO3-x(Na1/4Bi3/4)(Mg1/4Ti3/4)O3 (0 < x ≤ 0.2) ceramics were synthesized by the solid-state reaction and verified to form the perovskite structure. Three dielectric anomalies corresponding to the three phase transitions of BaTiO3 were observed for samples with 0.1 ≤ x < 0.2 and one of those dielectric anomalies exhibit relaxation behavior. At x = 0.2, three phase transitions are pinched, and a distinct ferroelectric relaxor-like behavior dominates. Hysteresis loops were observed for the compositions with 0 < x ≤ 0.2. For 0.14 ≤ x < 0.2 partial linear P-E behaviors are observed. Coexistence of pseudo-cubic (Na1/4Bi3/4)(Mg1/4Ti3/4)O3 and rhombohedral BaTiO3 phases depict a typical relaxor behavior in this system.
Acknowledgment
This work has been partially supported by (US) National Science Foundation under grants DMR 0407462 and 0844081 and by Office of Naval Research under grant N00014-08-0854. One of the authors (LW) acknowledges the support of National Natural Science Foundation of China (Project 50772087) and scholarship from China Scholar Council for the program of national study-abroad project for postgraduates of high level universities.