Physics – Condensed Matter – Materials Science
Scientific paper
2008-02-28
Physics
Condensed Matter
Materials Science
Invited talk in International Symposium on Integrated Ferroelectrics ISIF-2007 (to be published in Proceedings in "Integrated
Scientific paper
Bounded charges induced by the polarization gradient in finite-size ferroelectrics are known to produce the unfavorable depolarization electric field that suppresses the uniform ferroelectric state. To reduce the depolarization energy the non-uniform vortex (toroidal) state is formed inside ferroelectric nano-particles, nano-disks, and nano-rods. Based on self-consistent solution of Ginzburg-Landau equations coupled with electrostatic equations, we study the multivortex toroidal states appearing in the nanometric easy-plane ferroelectric cylinder. The geometrical textures, critical temperatures and stability regions for these states are calculated.
Lahoche Laurent
Luk'yanchuk I.
Pascoli Gianni
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