resumo
Local electromechanical (EM) measurements were performed in Pr doped BiFeO3 (BPFO) ceramics via piezoresponse force microscopy (PFM). The results revealed that local EM response was different from the macroscopic one due to the large contribution of the leakage current. The locally measured response was used to evaluate effective piezoelectric coefficient d(33) of the material. The multi-frequency PFM mode with additional compensation of the cantilever-surface Coulomb interaction under application of the external DC bias provided the most accurate values of the effective d(33) coefficient and allowed studying its surface distribution and residual depolarization field distribution across the surface of BPFO ceramics.
palavras-chave
PIEZORESPONSE FORCE MICROSCOPY; MULTIFERROIC PROPERTIES; CRYSTAL-STRUCTURE; EVOLUTION
categoria
Materials Science; Physics
autores
Abramov, AS; Alikin, DO; Neradovskiy, MM; Turygin, AP; Ushakov, AD; Rokeah, RO; Nikitin, AV; Karpinsky, DV; Shur, VY; Kholkin, AL
nossos autores
Andrei Kholkin
Investigador Coordenador
Denis Alikin
InvestigadorProjectos
CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013)
Transition metal oxides with metastable phases: a way towards superior ferroic properties (TransFerr)
agradecimentos
European Union's Horizon 2020 research and innovation program, Marie Sklodowska-Curie grant agreement No 778070 CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679, UID/CTM/50011/2013 RFBR, 17-52-04074.