A hexadomain vortex in tetragonal ferroelectrics

作者：Muench I; Huber J E^*

来源：Applied Physics Letters, 2009, 95(2): 022913.

DOI：10.1063/1.3183577

• dielectric polarisation
• electric domains
• ferroelectric materials
• nanostructured materials

We study internal flux closures in tetragonal ferroelectric crystals using a phase-field model and demonstrate the existence of a stable polarization vortex of six domains. This hexadomain vortex exhibits a threefold rotation axis and appears as a minimum energy equilibrium state over a narrow range of aspect ratios in freestanding cuboidal nanodots. Square polarization vortices of four domains represent lower energy solutions for a wide range of aspect ratios. The hexadomain vortex offers significant potential in memory storage applications as it has eight stable states.

• 出版日期2009-7-13