LOCAL PIEZOELECTRICITY IN SrTiO3-BiTiO3 CERAMICS

resumo

Local piezoelectric properties of Bi-doped SrTiO3 ceramics have been investigated by piezoresponse force microscopy. The appearance of both out-of-plane and in-plane polarization components confirmed the piezoelectric nature of the obtained signal. The absence of labyrinth-like structures in observed piezoelectric contrast is not consistent with the expected existence of a relaxor ferroelectric state in this material. The close similarity of local piezoelectric properties in Bi-doped SrTiO3 with pure SrTiO3 suggests that the origin of obtained piezoresponse can be attributed to the flexoelectric phenomenon. Bi-doping leads to occurrence of oxygen vacancies and negative charge on the surface of the sample.

palavras-chave

PHASE-TRANSITION; STRONTIUM-TITANATE; SRTIO3; DOPANTS

categoria

Physics

autores

Grigalaitis, R; Bagdzevicius, S; Banys, J; Tornau, EE; Bormanis, K; Sternberg, A; Bdikin, I; Kholkin, A

nossos autores

agradecimentos

This work was supported by European Union Structural Funds project

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