resumo
Pb1-xLax(Zr0.65Ti0.35)(1-x/4)O-3 (PLZT x/65/35) ceramics were studied by Piezoresponse Force Microscopy in order to understand the origin of domain structure as a function of La content. We show that the domain topology is mainly determined by the composition and grain size. The characteristic correlation length decreases with increasing La content, being sensitive also to the synthesis method. The behavior of the correlation length is linked to the macroscopic properties, showing a strong increase of disorder with La doping. The roughness exponent for the domain wall in PLZT 9/65/35 is close to 2/3 indicating 1D character of domain walls in relaxors.
palavras-chave
SINGLE-CRYSTALS; MICROSCOPY; TRANSITION
categoria
Materials Science; Physics
autores
Kiselev, DA; Neradovskaya, EA; Turygin, AP; Fedorovykh, VV; Shikhova, VA; Neradovskiy, MM; Sternberg, A; Shur, VY; Kholkin, AL
nossos autores
Andrei Kholkin
Investigador Principalagradecimentos
The equipment of the Ural Center for Shared Use "Modern Nanotechnology" of the Ural Federal University was used. The research was supported by the Russian Foundation of Basic Research (grant 16-02-00821-a) and by the Government of the Russian Federation (Act 211, Agreement 02.A03.21.0006). This work was also developed in the scope of the project CICECO - Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when applicable co-financed by FEDER under the PT2020 Partnership Agreement. The authors are thankful to Prof. M. Kosec for providing PLZT samples.