A hexadomain vortex in tetragonal ferroelectrics
Applied Physics Letters, ISSN: 0003-6951, Vol: 95, Issue: 2
2009
- 31Citations
- 18Captures
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Article Description
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. © 2009 American Institute of Physics.
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