Abstract
A series of polycrystalline Sr0.7−xCa0.3BaxTiO3 (SCBT) (0.0≤x≤0.25) samples were synthesized through solid-state reaction method, and their microstructural, anti-ferroelectric (AFE), ferroelectric (FE), dielectric, and phase transition properties were investigated. With the incorporation of Ba2+ at Sr2+ site, the AFE polar phase (x=0.0) has been sharply changed, experiencing AFE state, enhanced FE state, cooperative FE state, and normal FE state, owing to the competition and coupling interactions of different polar orderings in SCBT system. Note that excellent FE behavior has been found in the cooperative FE state. In addition, the critical region has been proposed in the T−x phase diagram.
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