Highlight: Nanoscale piezoresponse of ferroelectric domains

Oct 20, 2009
Nanoscale piezoresponse of ferroelectric domains

The first fundamental studies of the dependence of ferroelectric domain configuration and switching behavior on the shape of epitaxial BiFeO3 (BFO) nanostructures has been reported by users from Northwestern University, Korea Advanced Institute of Science & Technology, and Argonne’s Materials Science Division working collaboratively with CNM’s Nanofabrication & Devices Group.

The nanostructures were produced by growing BFO films on SrRuO3 (SRO) (001) oriented electrode layers on single-crystal SrTiO3 (STO) (100) substrates. Shapes were fabricated using rf-magnetron sputtering deposition followed by focused ion-beam lithography.

Domain configuration was investigated using piezoelectric force microscopy, revealing that the square-shaped nanostructures have a single variant domain configuration, whereas the round-shaped nanostructures exhibit seven variants of domain configuration.

The results have implications for the development of nanocapacitors for gigabyte to terabyte nonvolatile ferroelectric memories.

More information: S. Hong, J. Klug, M. Park,A. Imre, M. Bedzyk, K. No, A. Petford-Long, and O. Auciello, J. Appl. Phys., 105, 061619 2009

Provided by Argonne National Laboratory (news : web)

Explore further: A nanosized hydrogen generator

add to favorites email to friend print save as pdf

Related Stories

Coupling of Single Quantum Dots to Smooth Metal Films

Jul 20, 2009

Scientists at Argonne National Laboratory's CNM Nanophotonics Group have measured how light emission from individual colloidal semiconductor nanocrystals, or quantum dots, is modified when in proximity to ...

Reverse Chemical Switching of a Ferroelectric Film

Feb 25, 2009

(PhysOrg.com) -- Ferroelectric materials display a spontaneous electric polarization below the Curie temperature that can be reoriented, typically by applying an electric field. In this study, researchers ...

Shimmering ferroelectric domains

Jul 18, 2008

Ferroelectric materials are named after ferromagnetic ones because they behave in a similar way. The main difference: these materials are not magnetic, but permanently electrically polarized. They have great ...

New Gas Sensor Based on Multiwalled Carbon Nanotubes

May 27, 2009

Argonne Center for Nanoscale Materials staff in the Nanofabrication & Devices Group together with collaborative users from the University of Wisconsin-Milwaukee have fabricated a miniaturized gas sensor using ...

Recommended for you

A nanosized hydrogen generator

Sep 20, 2014

(Phys.org) —Researchers at the US Department of Energy's (DOE) Argonne National Laboratory have created a small scale "hydrogen generator" that uses light and a two-dimensional graphene platform to boost ...

For electronics beyond silicon, a new contender emerges

Sep 16, 2014

Silicon has few serious competitors as the material of choice in the electronics industry. Yet transistors, the switchable valves that control the flow of electrons in a circuit, cannot simply keep shrinking ...

Making quantum dots glow brighter

Sep 16, 2014

Researchers from the University of Alabama in Huntsville and the University of Oklahoma have found a new way to control the properties of quantum dots, those tiny chunks of semiconductor material that glow ...

The future face of molecular electronics

Sep 16, 2014

The emerging field of molecular electronics could take our definition of portable to the next level, enabling the construction of tiny circuits from molecular components. In these highly efficient devices, ...

User comments : 0