Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Maksymovych delves into 'completely different' ferroelectrics

Petro Maksymovych
Petro Maksymovych

Abstract:
Maksymovych and his colleagues at DOE's Oak Ridge National Laboratory have turned their attention to ferroelectric oxides, which are unique in that their structure is correlated in such as way as to produce spontaneous polarization that can be reversed by applying electric field.

Maksymovych delves into 'completely different' ferroelectrics

Oak Ridge, TN | Posted on November 23rd, 2009

Leaving his Ukraine roots destined for the United States to pursue a scientific career, Petro Maksymovych had little idea of the abundance of possibilities he would encounter.

"One of the things I wanted was to do something completely different than what I did as a graduate student," he says.

He is succeeding. Maksymovych and his colleagues at DOE's Oak Ridge National Laboratory have turned their attention to ferroelectric oxides, which are unique in that their structure is correlated in such as way as to produce spontaneous polarization that can be reversed by applying electric field. The stability and non-volatility of spontaneous polarization have made ferroelectrics ubiqitous in portable memory devices such as such as RFID cards in the form of FeRAM (Ferro-electric Random Access Memory.) On the fundamental side, ferroelectricity is a key component of multiferroic behavior, where spontaneous polarization is coupled to strain and magnetization.

It was hypothesized years ago that spontaneous polarization can control the electronic conductance of the ferroelectric oxide. This archetypal property would enable ultra-high density information storage in nanoscale ferroelectric materials, and "it is also a stepping stone to a broad range of novel phenomena arising from coupling of soft-phonon order parameters to electron transport," Maksymovych says. The problem, he says, is that these materials are practically insulators—"you can't run current across them. One way out is to shrink them down—but then you lose the polarization property and with it memory functionality."

Maksymovych and his colleagues working in ORNL's Center for Nanophase Materials Sciences have found a way around that: "You don't necessarily need to shrink it down. All you have to do is [use] a somewhat leakier medium. That will give you access to the interface, where ferroelectricity will manifest itself the most."

"These ‘leaky' thin films are usually avoided due to their interference with other measurements, like polarization. To avoid the problem, the researchers have assumed a new approach based entirely on scanning probe microscopy.

"Macroscopic measurements have little means to differentiate intrinsic and extrinsic behaviors. Our approach, by virtue of its low-dimensional design, lets us identify the intrinsic properties and resolve their variation across the surface. If we so desire, we can subsequently go and find defects in the material to see what influence they have on the intrinsic properties, or whether they dominate them," Maksymovych says.

The new approach is anticipated to affect much more than electronic applications. "We are very excited by this very first step. We are confident that the intriguing atomistic and electronic dynamics of multiferroics will bring in a new dimension in the physics of these materials with future relevance to both energy and information," Maksymovych says.

He earned a B.S. in chemistry from the Kiev Tara Shevchenko University in Ukraine and graduated from the University of Pittsburgh with a doctorate in physical chemistry. He arrived at ORNL in 2007 as a Eugene P. Wigner Fellow.

Since arriving at ORNL, Maksymovych has already authored or co-authored a number of papers in major peer-reviewed journals. In addition to oxide materials, he is currently working on a new intiative at the Center for Nanophase Materials Sciences, focused on chemical dynamics and electronic properties of single molecules and molecular assemblies. Maksymovych still finds time to dabble in activities outside of work, such as playing with the latest computer technology going hiking, attending underground musical theaters and learning how to play guitar, "a major affection."

####

About Oak Ridge National Laboratory
ORNL is a multiprogram science and technology laboratory managed for the U.S. Department of Energy by UT-Battelle, LLC. Scientists and engineers at ORNL conduct basic and applied research and development to create scientific knowledge and technological solutions that strengthen the nation's leadership in key areas of science; increase the availability of clean, abundant energy; restore and protect the environment; and contribute to national security.

ORNL also performs other work for the Department of Energy, including isotope production, information management, and technical program management, and provides research and technical assistance to other organizations. The laboratory is a program of DOE's Oak Ridge Field Office.

For more information, please click here

Contacts:
Oak Ridge National Laboratory
P.O. Box 2008
Oak Ridge, TN 37831
865.574.4160

Copyright © Oak Ridge National Laboratory

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

A new product to help combat mouldy walls, thanks to technology developed at the ICN2 December 14th, 2017

Sandia researchers make solid ground toward better lithium-ion battery interfaces: Reducing the traffic jam in batteries December 13th, 2017

Perking up and crimping the 'bristles' of polyelectrolyte brushes December 13th, 2017

Columbia engineers create artificial graphene in a nanofabricated semiconductor structure: Researchers are the first to observe the electronic structure of graphene in an engineered semiconductor; finding could lead to progress in advanced optoelectronics and data processing December 13th, 2017

Thin films

MIPT scientists revisit optical constants of ultrathin gold films October 20th, 2017

Rice University chemists make laser-induced graphene from wood July 31st, 2017

Graduate Students from Across the Country Attend Hands-on NanoCamp: Prominent scientists Warren Oliver, Ph.D., and George Pharr, Ph.D., presented a weeklong NanoCamp for hand-picked graduate students across the United States July 26th, 2017

Studying Argon Gas Trapped in Two-Dimensional Array of Tiny "Cages": Understanding how individual atoms enter and exit the nanoporous frameworks could help scientists design new materials for gas separation and nuclear waste remediation July 17th, 2017

Possible Futures

Sandia researchers make solid ground toward better lithium-ion battery interfaces: Reducing the traffic jam in batteries December 13th, 2017

Perking up and crimping the 'bristles' of polyelectrolyte brushes December 13th, 2017

Columbia engineers create artificial graphene in a nanofabricated semiconductor structure: Researchers are the first to observe the electronic structure of graphene in an engineered semiconductor; finding could lead to progress in advanced optoelectronics and data processing December 13th, 2017

Untangling DNA: Researchers filter the entropy out of nanopore measurements December 8th, 2017

Memory Technology

Leti Breakthroughs Point Way to Significant Improvements in SoC Memories December 6th, 2017

Scientists make transparent materials absorb light December 1st, 2017

A material with promising properties: Konstanz scientist synthesizes an important ferromagnetic semiconductor November 25th, 2017

Injecting electrons jolts 2-D structure into new atomic pattern: Berkeley Lab study is first to show potential of energy-efficient next-gen electronic memory October 13th, 2017

Announcements

A new product to help combat mouldy walls, thanks to technology developed at the ICN2 December 14th, 2017

Sandia researchers make solid ground toward better lithium-ion battery interfaces: Reducing the traffic jam in batteries December 13th, 2017

Perking up and crimping the 'bristles' of polyelectrolyte brushes December 13th, 2017

Columbia engineers create artificial graphene in a nanofabricated semiconductor structure: Researchers are the first to observe the electronic structure of graphene in an engineered semiconductor; finding could lead to progress in advanced optoelectronics and data processing December 13th, 2017

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

UCLA chemists synthesize narrow ribbons of graphene using only light and heat: Tiny structures could be next-generation solution for smaller electronic devices December 8th, 2017

Device makes power conversion more efficient: New design could dramatically cut energy waste in electric vehicles, data centers, and the power grid December 8th, 2017

Creating a new kind of metallic glass December 7th, 2017

Copper will replace toxic palladium and expensive platinum in the synthesis of medications: The effectiveness of copper nanoparticles as a catalyst has been proven December 5th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project