Abstract
Abstract
In this work, using the phase-field model, we demonstrated vortex structure can be generated in a lead-free BaTiO3/SrTiO3 superlattice structure. The labyrinth pattern (maze-like) domain structure was observed in a fully relaxed BaTiO3/SrTiO3 superlattice structure. Topological bubble-like rosette structures were found at an out-of-plane field, and polar skyrmions were obtained after the electric field was removed. In a designed fully relaxed nanowire of width ∼8 nm, near-perfect periodical clockwise-counterclockwise ferroelectric vortex pairs were generated due to the interfacial constraints. The simulated topological structures are potentially relevant to the application of high-density ferroelectrics memory devices.
Funder
State Key Lab of Advanced Metals and Materials of the University of Science and Technology Beijing
Advanced Functional Materials Research and Innovation Group of Xiamen Institute of Technology
Subject
General Physics and Astronomy,General Engineering