Publicação:
Local electromethanical properties of the CaCu 3Ti 4O 12 ceramics

Nenhuma Miniatura disponível

Data

2010-12-01

Autores

Orientador

Coorientador

Pós-graduação

Curso de graduação

Título da Revista

ISSN da Revista

Título de Volume

Editor

Tipo

Trabalho apresentado em evento

Direito de acesso

Acesso abertoAcesso Aberto

Resumo

Scanning probe microscopy (SPM) was used to probe piezoelectric vibrations and local conductivity in CaCu 3Ti 4O 12 (CCTO) ceramics at room temperature. Piezoelectric contrast was observed on the polished surfaces of CCTO in both vertical (out-of-plane) and lateral (in-plane) modes and depended on the grain orientation varying in sign and amplitude. The piezoelectric contrast is shown to be controlled by the electrical bias (local poling) and displayed a ferroelectric-like reversible hysteresis accompanied with a change of the phase of piezoelectric signal. Flexoelectric effect (strain-gradient-induced polarization) due to surface relaxation was invoked to explain the observed contrast inside the grains. © 2010 Materials Research Society.

Descrição

Palavras-chave

Electrical bias, Flexoelectric effects, Grain orientation, In-plane, Induced polarization, Out-of-plane, Piezoelectric signals, Piezoelectric vibration, Polished surfaces, Room temperature, Strain gradients, Ceramic materials, Perovskite, Probes, Scanning probe microscopy, Piezoelectricity

Idioma

Inglês

Como citar

Materials Research Society Symposium Proceedings, v. 1255, p. 6-10.

URI

http://hdl.handle.net/11449/72072

Itens relacionados

Financiadores

Coleções

Araraquara - IQAR - Instituto de Química

Unidades

Departamentos

Cursos de graduação

Programas de pós-graduação