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, AR)
Citation
Naumov, I. I., Bellaiche, L. M., Prosandeev, S. A., Ponomareva, I. V., & Kornev, I. A. (2009). Ferroelectric nanostructure having switchable multi-stable vortex states. Patents Granted. Retrieved from https://scholarworks.uark.edu/pat/87
Comments
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This work was supported by the Office of Naval Research (Grant Nos. N00014-01-1-0365, N00014-03-1-0598, N00014-01-1-0600, and N00014-04-1-0413), National Science Foundation (Grant Nos. DMR-0116315, DMR-9983678, and DMR-0404335, and MRI Grant No. 0421099), and the Department of Energy (Grant No. DE-FG02-05ER46188). The government has certain rights in the invention.
Ivan I. Naumov, Department of Physics, University of Arkansas, Fayetteville, AR
Laurent M. Bellaiche, Department of Physics, University of Arkansas, Fayetteville, AR
Sergey A. Prosandeev, Department of Physics, University of Arkansas, Fayetteville, AR
Inna V. Ponomareva, Department of Physics, University of Arkansas, Fayetteville, AR
Igor A. Kornev, Department of Physics, University of Arkansas, Fayetteville, AR