Ferroelectric nanostructure having switchable multi-stable vortex states

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

Ferroelectric nanostructure having switchable multi-stable vortex states

Patent · 22 September 2009

OSTI ID:988686

Naumov, Ivan I ^[1]; Bellaiche, Laurent M ^[1]; Prosandeev, Sergey A ^[1]; Ponomareva, Inna V ^[1]; Kornev, Igor A ^[1]

Fayetteville, AR

A ferroelectric nanostructure formed as a low dimensional nano-scale 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.

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Research Organization:: University of Arkansas

Sponsoring Organization:: USDOE

DOE Contract Number:: FG02-05ER46188

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

Patent Number(s):: 7,593,250

Application Number:: 11/811,444

OSTI ID:: 988686

Country of Publication:: United States

Language:: English

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