Navigation Links
ORNL theorist part of team that discovers unexpected magnetism
Date:10/18/2010

OAK RIDGE, Tenn., Oct. 18, 2010 -- Theoretical work done at the Department of Energy's Oak Ridge National Laboratory has provided a key to understanding an unexpected magnetism between two dissimilar materials.

The results, published in Nature Communications, have special significance for the design of future electronic devices for computations and telecommunications, according to co-author Satoshi Okamoto of ORNL's Materials Science and Technology Division. The work was performed at Universidad Complutense de Madrid, synchrotron radiation facilities in France and Japan, University of Bristol and University of Warwick.

"What the team found was an unexpected magnetic order among the titanium atoms at an interface between strontium titanate and lanthanum manganite, which are both insulators in bulk," Okamoto said.

With today's nano-fabrication tools, scientists can develop artificial materials with controlled precision almost atom by atom of alternating very thin crystalline layers of different materials. The properties of these materials are determined by the structure of interfaces of the different materials and how atoms interact through the interfaces.

Such an interface has traditionally been considered a source of disorder, but in the case of materials such as complex oxides used for this study, the result was something that does not exist naturally in any other material. In order to clarify the electronic properties of such interfaces, the research team made detailed synchrotron X-ray measurements.

"The result was even more surprising as we observed a new type of magnetism in titanium atoms, which are non-magnetic in bulk strontium titanate," Okamoto said.

Furthermore, the researchers were able to manipulate the structure of spin, or magnetism, at atomic scale. The theoretical work by Okamoto provided the key to understand the origin of this novel form of interfacial magnetism and is of particular importance for the development of new spintronic devices such as tunneling magneto-resistance junction, which can be used as a head of a hard-disc drive.

While today's electronic devices are based on the transfer of electrical charge between two materials, a potential alternative, spintronic devices, would also use the magnetic moment, or spin, of electrons in addition to their charge and would therefore be more efficient for sending or storing information as an electric signal.


'/>"/>

Contact: Ron Walli
wallira@ornl.gov
865-576-0226
DOE/Oak Ridge National Laboratory
Source:Eurekalert

Related biology technology :

1. deCODE Discovers Common Genetic Variations Contributing to Low Bone Mineral Density and Risk of Osteoporosis
2. deCODE Discovers First Genetic Variant Conferring Increased Risk of Essential Tremor
3. TauTaTis Discovers Potent Inhibitor of Parkinsons Disease Gene Activity
4. Biologist discovers pink-winged moth in Chiricahua Mountains
5. NIST discovers how strain at grain boundaries suppresses high-temperature superconductivity
6. deCODE Discovers a Gene Linked to Risk of Kidney Stones and Osteoporosis
7. Its Not Just the Sun: deCODE Discovers Sequence Variants Affecting Susceptibility to Skin Cancer
8. Rib-X Pharmaceuticals Antibiotic Drug Discovery Platform Discovers Novel Compounds with Activity Against Key Multiple Drug Resistant Gram-negative Bacteria
9. Brown physicist discovers odd, fluctuating magnetic waves
10. deCODE Discovers Genetic Risk Factor Linking Susceptibility to Four Major Vascular Diseases
11. deCODE Discovers Major Genetic Risk Factor for the Most Common Form of Glaucoma
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/23/2017)... , March 23, 2017 Kineta, ... development of novel therapies in immuno-oncology, today announced ... lead" small molecule compounds that activate interferon response ... pathways and demonstrate immune-mediated tumor regression in a ... the study who demonstrated complete tumor regression to ...
(Date:3/23/2017)... New Orleans, La. (PRWEB) , ... March 23, ... ... of real-time, industrial monitoring solutions, today announced the hire of Dr. Sigmund “Sig” ... for APMT customer applications, strategic partnerships and joint development activities. , “Dr. Floyd’s ...
(Date:3/22/2017)... -- Good Start Genetics, a leading family genomics company, ... covered lives mark through its most recent payor addition, ... . With newly signed contracts nationally and others in ... acceptance based on the quality of its science, the ... industry-leading customer care and support and its published cost-effectiveness ...
(Date:3/22/2017)... , March 22, 2017 /PRNewswire/ - FACIT ... (the "Company" or "Propellon"), a start-up created by ... anti-cancer therapeutics. FACIT,s investment, combined with non-dilutive capital, ... program. The seed funding enables Propellon to accelerate ... the Company for financing and/or entering a strategic ...
Breaking Biology Technology:
(Date:2/16/2017)... , Feb. 16, 2017  Genos, a ... announced that it has received Laboratory Accreditation from ... Accreditation is presented to laboratories that meet stringent ... demonstrate scientifically rigorous processes. "Genos is ... in laboratory practices. We,re honored to be receiving ...
(Date:2/13/2017)... Former 9/11 Commission border counsel and Special Counsel to ... of Identity Strategy Partners, LLP, today releases the following ... Protecting the Nation From Foreign Terrorist Entry Into the ... Trump,s ,Travel Ban, Executive Order gains more notoriety and ... ban, it is important that our national discourse regain ...
(Date:2/8/2017)... Feb. 8, 2017 About Voice Recognition Biometrics ... match it against a stored voiceprint template. Acoustic ... cadence, and tone are compared to distinguish between ... installation, as most PCs already have a microphone ... Voice recognition biometrics are most likely to be ...
Breaking Biology News(10 mins):