Subscribe to our free daily newsletters
. 24/7 Space News .




Subscribe to our free daily newsletters



TECH SPACE
Ferroelectric phenomenon proven viable for oxide electrodes, disproving predictions
by Staff Writers
Washington DC (SPX) Aug 07, 2017


(a) FCD domains in the PTO layer with symmetric oxide electrodes. (b) Alternating current domains in the PTO layer with asymmetric oxide electrodes. Credit Shuang Li and Yinlian Zhu

Flux-closure domain (FCD) structures are microscopic topological phenomena found in ferroelectric thin films that feature distinct electric polarization properties. These closed-loop domains have garnered attention among researchers studying new ferroelectric devices, ranging from data storage components and spintronic tunnel junctions to ultra-thin capacitors.

In the development of thin films for such devices, researchers have thought that contact with commonly used oxide electrodes limits FCD formation.

However, a group of researchers in China has shown otherwise. The findings are reported this week as the cover article in Applied Physics Letters, from AIP Publishing.

Ferroelectric materials are typically developed and studied as thin films, sometimes as thin as only a few nanometers. As a result, researchers have begun discovering the abundant domain structures and unique physical properties that these ferroelectrics possess, such as skyrmion and FCD formation that could benefit next-generation electronic devices. Because the films are so thin, however, their interaction with electrodes is inevitable.

"The general thinking has been that oxide electrodes would destabilize flux-closure domains. However, our work has shown that this is no longer true when the top and bottom electrodes are symmetric, which physically makes sense," said Yinlian Zhu, professor at the Institute of Metal Research at the Chinese Academy of Sciences and a co-author of the paper.

Zhu and colleagues used two types of oxide electrodes: one based on strontium ruthenate, the other based on lanthanum strontium manganite, chosen as oxide electrodes because of their similar perovskite structures, which work well in layer-by-layer film growth.

They studied how these electrodes influenced FCD formation in PbTiO3 (PTO) perovskite-oxide-based thin films deposited on gadolinium scandium oxide (GSO) substrates.

The research team's previous studies indicated that flux-closure domains can be stabilized in strained ferroelectric films in which the strain plays a critical role in the formation of flux-closure domains, such as multilayer PTO/strontium titanate systems grown on GSO-based (specifically GdScO3) substrates.

Based on their previous studies, the researchers consequently anticipated that similar phenomenon might also occur in PTO/electrode systems. They then grew PTO films sandwiched between symmetric oxide electrodes on GSO substrates using pulsed laser deposition.

They found that periodic FCD arrays can be stabilized in PTO films when the top and bottom electrodes are symmetric, while alternating current domains appear when they apply asymmetric electrodes.

"We successfully grew ferroelectric thin films with symmetric oxide electrodes in which flux-closure domains and their periodic arrays clearly do exist," Zhu said.

"Our work sheds light on understanding the nature of flux-closure domains in ferroelectrics. We expect that it will open research possibilities in the evolution of these structures under external electric fields."

The article, "Periodic arrays of flux-closure domains in ferroelectric thin films with oxide electrodes," is authored by S. Li, Y.L. Zhu, Y.J. Wang, Y.L. Tang, Y. Liu, S.R. Zhang, J.Y. Ma and X.L. Ma. The article appeared in Applied Physics Letters July 31, 2017 (DOI: 10.1063/1.4996232).

TECH SPACE
UBC research unearths Canadian sapphires fit for a queen
Vancouver, Canada (SPX) Jul 31, 2017
New research from UBC mineralogists could make it easier to find high-quality Canadian sapphires, the same sparkling blue gems that adorn Queen Elizabeth II's Sapphire Jubilee Snowflake Brooch. The so-called Beluga sapphires were discovered near Kimmirut, Baffin Island, Nunavut by brothers Nowdluk and Seemeega Aqpik in 2002. The location is Canada's only known deposit of sapphires. The gem ... read more

Related Links
American Institute of Physics
Space Technology News - Applications and Research


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

TECH SPACE
NASA Offers Space Station as Catalyst for Discovery in Washington

Let's cut them off from access to Space

ESA astronaut Paolo Nespoli starts third mission on Space Station

NextSTEP Partners Develop Ground Prototypes to Expand our Knowledge of Deep Space Habitats

TECH SPACE
ISRO Develops Ship-Based Antenna System to Track Satellite Launches

India looks to more launches with new facility from 2018

Sea Launch to be modernized for Russia's Soyuz-5 carrier rocket

Navy completes testing fixes on electro-magnetic launch systems

TECH SPACE
For Moratorium on Sending Commands to Mars, Blame the Sun

Tributes to wetter times on Mars

Opportunity will spend three weeks at current location due to Solar Conjunction

Curiosity Mars Rover Begins Study of Ridge Destination

TECH SPACE
China develops sea launches to boost space commerce

Chinese satellite Zhongxing-9A enters preset orbit

Chinese Space Program: From Setback, to Manned Flights, to the Moon

Chinese Rocket Fizzles Out, Puts Other Launches on Hold

TECH SPACE
ASTROSCALE Raises a Total of $25 Million in Series C Led by Private Companies

LISA Pathfinder: bake, rattle and roll

Airbus DS to expand cooperation with Russia

UK space companies to develop international partnerships

TECH SPACE
Algorithms that can sketch, recreate 3-D shapes

Nanoparticles for 3-D printing in water open door to advanced biomedical materials

WSU physicists turn a crystal into an electrical circuit

Researchers set new record for tape storage

TECH SPACE
A New Search for Extrasolar Planets from the Arecibo Observatory

Gulf of Mexico tube worm is one of the longest-living animals in the world

Molecular Outflow Launched Beyond Disk Around Young Star

Breakthrough Starshot launches tiny spacecraft in quest for Alpha Centauri

TECH SPACE
New Horizons Video Soars over Pluto's Majestic Mountains and Icy Plains

Juno spots Jupiter's Great Red Spot

New evidence in support of the Planet Nine hypothesis

NASA's New Horizons Team Strikes Gold in Argentina




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement