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Influence of asymmetric surface screening conditions on vortex switching in a ferroelectric nanodot

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The behaviors of vortex switching in a ferroelectric nanodot on different surface screening conditions are investigated by phase-field simulations. It is found that asymmetric electrical boundary conditions have a significant… Click to show full abstract

The behaviors of vortex switching in a ferroelectric nanodot on different surface screening conditions are investigated by phase-field simulations. It is found that asymmetric electrical boundary conditions have a significant effect on the formation of vortex domain structures and play a deterministic role in manipulating the vortex chirality by a homogeneous electrostatic field. The results indicate that the critical electric field for vortex switching can be greatly reduced by engineering the asymmetric surface screening conditions in a ferroelectric nanodot with a regular structure and uniform composition.

Keywords: screening conditions; switching ferroelectric; vortex switching; ferroelectric nanodot; surface screening

Journal Title: Journal of Physics D: Applied Physics
Year Published: 2021

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