resumo
Stress-induced local polarization reversal was studied in La doped BiFeO3 ceramics under the action of Berkovich-type prism indentation. Piezoresponse force microscopy was used for detailed study of domain structure before and after local polarization reversal. Two mechanisms of domain formation under the action of the mechanical loading were revealed: (1) direct stress-induced and (2) stress mediated by grain clamping. Critical stress value for local polarization reversal was extracted from the dependence of the switched area on the applied loading force.
palavras-chave
BATIO3 SINGLE-CRYSTAL; GRAIN-BOUNDARIES; DOMAIN-STRUCTURE; THIN-FILMS; IN-SITU; STRESS; BEHAVIOR; NANOINDENTATION; TRANSFORMATION; EVOLUTION
categoria
Materials Science; Physics
autores
Abramov, AS; Alikin, DO; Yuzhakov, VV; Nikitin, AV; Latushko, SI; Karpinsky, DV; Shur, VY; Kholkin, AL
nossos autores
Andrei Kholkin
Investigador Principal
Denis Alikin
Investigador Auxiliaragradecimentos
The equipment of the Ural Center for Shared Use Modern nanotechnology Ural Federal University was used. The study was funded by RFBR (grant No. 17-52-04074) and BRFFR (grant No. F17RM-036), by Government of the Russian Federation (Act 211, Agreement 02.A03.21.0006). This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT Ref. UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement. This project has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No 778070. VS is grateful for financial support of the Ministry of Science and Higher Education of the Russian Federation (state task 3.4993.2017/6.7).