Strain-induced vortex domain structure in Nano-crystalline ferroelectric

Abstract

Ferroelectric domain structures have attracted much attention due to their potential applications in storage. In this paper, the molecular dynamics method based on shell model is employed to simulate the uniaxial tensile strain applied to the BaTiO₃ thin film, and the effect of strain on the polarization domain structure of BaTiO₃ thin film is discussed. The results show that with the increase of strain, the polarization configuration of BaTiO₃ film evolves from the initial 180°domain structure to the vortex domain configuration. Moreover, the vortex domain will show certain movement rules with the increase of stress. These results are beneficial to the application research of ferroelectric storage.

Keywords:

• Nano-film
• vortex controlling
• strain-induced
• simulation

Acknowledgements

The authors are grateful for these financial supports.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (No. 11602154), the Science and Technology Planning Project of Sichuan Province (NO. 2019YJ0157) and the Opening Project of Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province (No. SZDKF-1702).