Document Type

Patent

Publication Date

9-22-2009

Abstract

A ferroelectric nanostructure formed as a low dimensional nanoscale ferroelectric material having at least one vortex ring of polarization generating an ordered toroid moment switchable between multi-stable states. A stress-free ferroelectric nanodot under open-circuit-like electrical boundary conditions maintains such a vortex structure for their local dipoles when subject to a transverse inhomogeneous static electric field controlling the direction of the macroscopic toroidal moment. Stress is also capable of controlling the vortex's chirality because of the electromechanical coupling that exists in ferroelectric nanodots.

Department

Physics

Patent Number

US7593250

Application Number

US20080130346

Application Published

6-5-2008

Application Filed

6-8-2007

Assignee

Board of Trustees of the University of Arkansas (Little Rock, AK)

Comments

Ivan I. Naumov, Department of Physics; Laurent M. Bellaiche, Department of Physics; Sergey A. Prosandeev, Department of Physics; Inna V. Ponomareva, Department of Physics; Igor A. Kornev, Department of Physics

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