Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > NIST Measures Key Property of Potential 'Spintronic' Material

Manganite oxide lattices (purple) doped with lanthanum (magenta) and strontium (green) have potential for use in spintronic memory devices, but their usual disorderly arrangement (left) makes it difficult to explore their properties. The ANL/NIST team's use of a novel orderly lattice (right) allowed them to measure some of the material's fundamental characteristics.
Credit: Argonne National Laboratory
Manganite oxide lattices (purple) doped with lanthanum (magenta) and strontium (green) have potential for use in spintronic memory devices, but their usual disorderly arrangement (left) makes it difficult to explore their properties. The ANL/NIST team's use of a novel orderly lattice (right) allowed them to measure some of the material's fundamental characteristics.

Credit: Argonne National Laboratory

Abstract:
An advanced material that could help bring about next-generation "spintronic" computers has revealed one of its fundamental secrets to a team of scientists from Argonne National Laboratory (ANL) and the National Institute of Standards and Technology (NIST).

NIST Measures Key Property of Potential 'Spintronic' Material

Gaithersburg, MD | Posted on October 27th, 2011

The material, constructed of two different compounds, might one day allow computers to use the magnetic spin of electrons, in addition to their charge, for computation. A host of innovations could result, including fast memory devices that use considerably less power than conventional systems and still retain data when the power is off. The team's effort not only demonstrates that the custom-made material's properties can be engineered precisely, but in creating a virtually perfect sample of the material, the team also has revealed a fundamental characteristic of devices that can be made from it.

Team members from ANL began by doing something that had never been done before—engineering a highly ordered version of a magnetic oxide compound that naturally has two randomly distributed elements: lanthanum and strontium. Stronger magnetic properties are found in those places in the lattice where extra lanthanum atoms are added. Precise placement of the strontium and lanthanum within the lattice can enable understanding of what is needed to harness the interaction of the magnetic forces among the layers for memory storage applications, but such control has been elusive up to this point.

"These oxides are physically messy to work with, and until very recently, it was not possible to control the local atomic structure so precisely," says Brian Kirby, a physicist at the NIST Center for Neutron Research (NCNR). "Doing so gives us access to important fundamental properties, which are critical to understand if you really want to make optimal use of a material."

The team members from ANL have mastered a technique for laying down the oxides one atomic layer at a time, allowing them to construct an exceptionally organized lattice in which each layer contains only strontium or lanthanum, so that the interface between the two components could be studied. The NIST team members then used the NCNR's polarized neutron reflectometer to analyze how the magnetic properties within this oxide lattice changed as a consequence of the near-perfect placement of atoms.

They found that the influence of electrons near the additional lanthanum layers was spread out across three magnetic layers in either direction, but fell off sharply further away than that. Tiffany Santos, lead scientist on the study from ANL, says that the measurement will be important for the emerging field of oxide spintronics, as it reveals a fundamental size unit for electronic and magnetic effects in memory devices made from the material.

"For electrons to share spin information—something required in a memory system—they will need to be physically close enough to influence each other," Kirby says. "By ordering this material in such a precise way, we were able to see just how big that range of influence is."

* T. S. Santos, B. J. Kirby, S. Kumar, S. J. May, J. A. Borchers, B. B. Maranville, J. Zarestky, S. G. E. te Velthuis, J. van den Brink and A. Bhattacharya. Delta doping of ferromagnetism in antiferromagnetic manganite superlattices. Physical Review Letters, Week ending Oct. 14, 2011, 107, 167202 (2011), DOI: 10.1103/PhysRevLett.107.167202.

####

About National Institute of Standards and Technology (NIST)
The National Institute of Standards and Technology (NIST) is an agency of the U.S. Department of Commerce.

For more information, please click here

Contacts:
Chad Boutin
301-975-4261

Copyright © National Institute of Standards and Technology (NIST)

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

Light can 'heal' defects in new solar cell materials: Defects in some new electronic materials can be removed by making ions move under illumination May 24th, 2016

Attosecond physics: A switch for light-wave electronics May 24th, 2016

Supercrystals with new architecture can enhance drug synthesis May 24th, 2016

Nanoscale Trojan horses treat inflammation May 24th, 2016

Laboratories

ORNL demonstrates large-scale technique to produce quantum dots May 21st, 2016

Scientists take a major leap toward a 'perfect' quantum metamaterial: Berkeley Lab, UC Berkeley researchers lead study that uses trapped atoms in an artificial crystal of light May 13th, 2016

Atomic force microscope reveals molecular ghosts: Mapping molecules with atomic precision expands toolbox for designing new catalytic reactions May 11th, 2016

Visualizing the Lithiation of a Nanosized Iron-Oxide Material in Real Time: Electron microscopy technique reveals the reaction pathways that emerge as lithium ions are added to magnetite nanoparticles May 9th, 2016

Govt.-Legislation/Regulation/Funding/Policy

Light can 'heal' defects in new solar cell materials: Defects in some new electronic materials can be removed by making ions move under illumination May 24th, 2016

Supercrystals with new architecture can enhance drug synthesis May 24th, 2016

Nanoscale Trojan horses treat inflammation May 24th, 2016

Programmable materials find strength in molecular repetition May 23rd, 2016

Spintronics

Spin lifetime anisotropy of graphene is much weaker than previously reported May 10th, 2016

Spintronics for future information technologies: Spin currents in topological insulators controlled May 2nd, 2016

Atomic magnets using hydrogen and graphene April 27th, 2016

The light stuff: A brand-new way to produce electron spin currents - Colorado State University physicists are the first to demonstrate using non-polarized light to produce a spin voltage in a metal April 26th, 2016

Chip Technology

Attosecond physics: A switch for light-wave electronics May 24th, 2016

Physicists create first metamaterial with rewritable magnetic ordering May 23rd, 2016

Graphene: Progress, not quantum leaps May 23rd, 2016

Researchers demonstrate size quantization of Dirac fermions in graphene: Characterization of high-quality material reveals important details relevant to next generation nanoelectronic devices May 20th, 2016

Discoveries

Light can 'heal' defects in new solar cell materials: Defects in some new electronic materials can be removed by making ions move under illumination May 24th, 2016

Attosecond physics: A switch for light-wave electronics May 24th, 2016

Supercrystals with new architecture can enhance drug synthesis May 24th, 2016

Nanoscale Trojan horses treat inflammation May 24th, 2016

Announcements

Light can 'heal' defects in new solar cell materials: Defects in some new electronic materials can be removed by making ions move under illumination May 24th, 2016

Attosecond physics: A switch for light-wave electronics May 24th, 2016

Supercrystals with new architecture can enhance drug synthesis May 24th, 2016

Nanoscale Trojan horses treat inflammation May 24th, 2016

Research partnerships

Light can 'heal' defects in new solar cell materials: Defects in some new electronic materials can be removed by making ions move under illumination May 24th, 2016

Mille-feuille-filter removes viruses from water May 19th, 2016

Carnegie Mellon develops bio-mimicry method for preparing and labeling stem cells: Method allows researchers to prepare mesenchymal stem cells and monitor them using MRI May 19th, 2016

The CEA Announces Expanded Collaboration with Intel to Advance Cutting-edge Research and Innovation in Key Digital Areas May 17th, 2016

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







Car Brands
Buy website traffic