Ferroelectric domain structure and local piezoelectric properties of sol-gel derived Pb(Zr1-xTix)O-3 films

resumo

High-resolution domain studies are performed on Pb(Zr1-xTix)O-3 (PZT) films of different thicknesses and compositions (x = 0.30, 0.48, and 0.70) by piezoresponse force microscopy (PFM). Depending on the composition, the orientation of the films is varied from purely (111) (related to the orientation of Pt bottom electrode) to a more random texture. Statistical processing of the obtained domain images is used to analyze the correlation between the composition of the films and their nanoscale piezoelectric properties. It is shown that the virgin (unpoled) films possess large piezoelectric activity comparable to that after local poling (self-polarization effect). This corresponds to a clear predominance of the domains with polarization oriented from the free surface of the film to the bottom electrode. Both the average piezoelectric signal and half-width of the piezoelectric histograms depend on the composition and thickness of the films. The largest local piezoelectric coefficient and the broadest distribution are found for tetragonal (x = 0.70) films with almost pure (111) texture. The results are discussed in terms of texture and PFM instrumentation effects on local piezoelectric measurements.

palavras-chave

SCANNING FORCE MICROSCOPY; LEAD-ZIRCONATE-TITANATE; THIN-FILMS; PB(ZR,TI)O-3; ORIENTATION; PHASE; CAPACITORS; DEPENDENCE; BEHAVIOR

categoria

Materials Science; Physics

autores

Bdikin, IK; Shvartsman, VV; Kholkin, AL; Kim, SH

nossos autores

Partilhe este projeto

Publicações similares

Usamos cookies para atividades de marketing e para lhe oferecer uma melhor experiência de navegação. Ao clicar em “Aceitar Cookies” você concorda com nossa política de cookies. Leia sobre como usamos cookies clicando em "Política de Privacidade e Cookies".