Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > A hidden magnetic configuration in manganite thin films

Preparing samples for study at the NSLS.
Preparing samples for study at the NSLS.

Abstract:
Complex oxide materials are intriguing because their properties span an enormous range of distinct physical states, including conductors, insulators, superconductors, ferromagnets, anti-ferromagnets, ferro-electrics, piezo electrics, and multiferroics. Part of the attraction of these materials is that their properties can be modified by introducing a mixed valence state — that is, a composition that includes metal ions with more than one oxidation state.

A hidden magnetic configuration in manganite thin films

Upton, NY | Posted on February 8th, 2011

Scientists from DOE's Brookhaven and Lawrence Berkeley National Laboratories, SLAC National Accelerator Center, and collaborators at the University of California, Berkeley, and the Science and Technology Facilities Council of the UK are taking a closer look at one such material with a particular composition of lanthanum strontium and magnesium oxide.

La0.7Sr0.3MnO3 (LSMO) is a mixed-valence, complex oxide (containing a mix of Mn3+ and Mn4+ ions) whose properties have been examined extensively. LSMO is thought to be a simple metallic ferromagnet and it has been used in prototype, thin-film electrical devices (such as magneto-resistance junctions) that seek to exploit the many intriguing properties of complex oxides for new applications.

To further explore LSMO, the scientists grew single-layer films with a variable number of unit cells epitaxially on strontium titanate (STO). Using a combination of x-ray magnetic circular dichroism, x-ray absorption spectroscopy, and x-ray reflectivity measurements at Brookhaven's National Synchrotron Light Source (NSLS), the scientists discovered that, due to doping instabilities and/or charge transfer at the interface, an intermediate enriched Mn3+ layer of a few unit cells develops at the LSMO/STO interface. The presence of this intermediate layer may provide a mechanism for antiferromagnetic coupling across the interface — which, in turn, may lead to the reversed magnetic configuration observed in thicker LSMO films.

The findings demonstrate the rich variety of interfacial spin couplings that can occur in complex oxide thin films that may be utilized in engineering thin-film devices. This work was partially supported by the Semiconductor Research Corporation's NRI-WIN program.

####

About Brookhaven National Laboratory
One of ten national laboratories overseen and primarily funded by the Office of Science of the U.S. Department of Energy (DOE), Brookhaven National Laboratory conducts research in the physical, biomedical, and environmental sciences, as well as in energy technologies and national security. Brookhaven Lab also builds and operates major scientific facilities available to university, industry and government researchers. Brookhaven is operated and managed for DOE’s Office of Science by Brookhaven Science Associates, a limited-liability company founded by Stony Brook University, the largest academic user of Laboratory facilities, and Battelle, a nonprofit, applied science and technology organization.

For more information, please click here

Contacts:
Karen McNulty Walsh
631.344.8350,

Copyright © Brookhaven 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

JPK announces expansion of its global sales and service activities in China and USA April 15th, 2014

Nanobiotix Appoints Thierry Otin as Head of Manufacturing and Supply April 15th, 2014

PAM-XIAMEN Offers UV LED wafer April 15th, 2014

Engineers develop new materials for hydrogen storage April 15th, 2014

Thin films

Industry Veteran Fergus Clarke Joins Picodeon as CEO: Appointment comes as Picodeon prepares for growth April 8th, 2014

Scalable CVD process for making 2-D molybdenum diselenide: Rice, NTU scientists unveil CVD production for coveted 2-D semiconductor April 8th, 2014

High-quality nanometric bilayers prepared by aqueous solutions March 26th, 2014

A new concept for manufacturing wrinkling patterns on hard-nano-film/soft-matter-substrate March 24th, 2014

Govt.-Legislation/Regulation/Funding/Policy

Engineers develop new materials for hydrogen storage April 15th, 2014

Tiny particles could help verify goods: Chemical engineers hope smartphone-readable microparticles could crack down on counterfeiting April 15th, 2014

A molecular approach to solar power: Switchable material could harness the power of the sun — even when it’s not shining April 15th, 2014

Targeting cancer with a triple threat: MIT chemists design nanoparticles that can deliver three cancer drugs at a time April 15th, 2014

Possible Futures

Virus structure inspires novel understanding of onion-like carbon nanoparticles April 10th, 2014

Local girl does good March 22nd, 2014

Surface Characteristics Influence Cellular Growth on Semiconductor Material March 12th, 2014

The "Tipping Point" February 12th, 2014

Academic/Education

Director Wally Pfister joins UC Berkeley neuroengineers to discuss the science behind ‘Transcendence’ April 7th, 2014

First annual science week highlights STEM pipeline and partnerships: UB, SUNY Buffalo State and ECC team up with the City of Buffalo and its schools for April 7-11 events April 3rd, 2014

Global 450 consortium announces new general manager of internal operations: TSMC’s Cheng-Chung Chien Receives Unanimous Support, Brings History of Innovation and Efficiency to Global Consortium of Companies Driving Industry Transition to 450mm Wafer Technology March 26th, 2014

NanoTecNexus to Host "Chemistry of Wine" Fundraiser in Support of STEM Education - Collaborations Key to Success - March 20th, 2014

Nanoelectronics

Better solar cells, better LED light and vast optical possibilities April 12th, 2014

Catching the (Invisible) Wave: UC Santa Barbara researchers create a unique semiconductor that manipulates light in the invisible infrared/terahertz range, paving the way for new and enhanced applications April 11th, 2014

Nanotech Business Review 2013-2014 April 9th, 2014

Preview of Hands-on Nanotechnology Demos at ‘Chemistry of Wine’ Fundraiser to Show Nanotech Magic April 8th, 2014

Materials/Metamaterials

Engineers develop new materials for hydrogen storage April 15th, 2014

Industrial Nanotech, Inc. Lands First Major Order from Pemex, Mexico’s State-Owned Oil and Gas Company April 14th, 2014

Properties of Coatings Used in Electrical Insulators Modified by Iranian Researchers April 14th, 2014

Graphene Supermarket to offer HDPlas™ by Haydale, a High-Performance Graphene Material April 10th, 2014

Announcements

Tiny particles could help verify goods: Chemical engineers hope smartphone-readable microparticles could crack down on counterfeiting April 15th, 2014

A molecular approach to solar power: Switchable material could harness the power of the sun — even when it’s not shining April 15th, 2014

Targeting cancer with a triple threat: MIT chemists design nanoparticles that can deliver three cancer drugs at a time April 15th, 2014

Biologists Develop Nanosensors to Visualize Movements and Distribution of Plant Stress Hormone April 15th, 2014

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







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE