Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5898
Title: Effects of the surface charge screening and temperature on the vortex domain patterns of ferroelectric nanodots
Authors: Wu, CM
Chen, WJ
Ma, DC
Woo, CH
Zheng, Y
Keywords: Electric domains
Ferroelectric transitions
Nanostructured materials
Phase diagrams
Surface charging
Vortices
Issue Date: 15-Nov-2012
Publisher: American Institute of Physics
Source: Journal of applied physics, 15 Nov. 2012, v. 112, no. 10, 104108, p. 1-8 How to cite?
Journal: Journal of applied physics 
Abstract: Based on the phase field simulations, effects of the surface charge screening and temperature on the vortex domain structure of the ferroelectric nanodot have been investigated. Our calculations show that the ferroelectric nanodot adopts a rhombohedral vortex domain pattern under an ideal open-circuit boundary condition. With the increase of the surface charge screening, the dipole vortex gradually rotates and appears rhombohedral-orthorhombic-tetragonal transformation. By adjusting the surface charge screening, the polar single domain and multi-vortices domain patterns with zero toroidal moment have been obtained near the phase transition temperature. More importantly, temperature and charge screening “T-C” phase diagram has been summarized, which indicates an effective method to control the vortex domain structure in the low-dimensional ferroelectric nanostructures.
URI: http://hdl.handle.net/10397/5898
ISSN: 0021-8979 (print)
1089-7550 (online)
DOI: 10.1063/1.4766382
Rights: © 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in C. M. Wu et al., J. Appl. Phys. 112, 104108 (2012) and may be found at http://link.aip.org/link/?jap/112/104108
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