Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Study suggests second life for possible spintronic materials: Ohio University research merges manganese, gallium nitride in uniform layer

This image shows a 3-D rendering of a stable manganese gallium nitride surface structure.

Credit: A.R. Smith, Ohio University
This image shows a 3-D rendering of a stable manganese gallium nitride surface structure.

Credit: A.R. Smith, Ohio University

Abstract:
Ten years ago, scientists were convinced that a combination of manganese and gallium nitride could be a key material to create spintronics, the next generation of electronic devices that operate on properties found at the nanoscale. But researchers grew discouraged when experiments indicated that the two materials were as harmonious as oil and water.

Study suggests second life for possible spintronic materials: Ohio University research merges manganese, gallium nitride in uniform layer

Athens, OH | Posted on June 6th, 2013

A new study led by Ohio University physicists suggests that scientists should take another look at this materials duo, which once was heralded for its potential to be the building block for devices that can function at or above room temperature.

"We've found a way—at least on the surface of the material—of incorporating a uniform layer," said Arthur Smith, a professor of physics and astronomy at Ohio University who leads the international collaboration of Argentinian and Spanish researchers.

The scientists made two important changes to create the material merger, they report in the journal Physical Review B. First, they used the nitrogen polarity of gallium nitride, whereas conventional experiments used the gallium polarity to attach to the manganese, Smith explained. Second, they heated the sample.

At lower temperatures (less than 105 degrees Celsius), the manganese atoms "float" on the outer layer of gallium atoms. When the scientists raised the temperature about 100 degrees Celsius, Smith said, the atoms connected to the nitrogen layer underneath, creating a manganese-nitrogen bond. This bond remains stable, even at very high temperatures.

The theoretical scientists accurately predicted that a "triplet" structure of three manganese atoms would form a metastable structure at low temperatures, Smith said. But at higher temperatures, those manganese atoms break apart and bond with nitrogen. Valeria Ferrari of the Centro Atómico Constituyentes said her group performed quantum mechanical simulations to test which model structures have the lowest energy, which suggested both the trimer structure and the manganese-nitrogen bonded structure.

Now that scientists have shown that they can create a stable structure with these materials, they will investigate whether it has the magnetic properties at room temperature necessary to function as a spintronic material.
###

The study authors are Abhijit Chinchore, Kangkang Wang, Meng Shi, Andrada Mandru, Yinghao Liu, Muhammad Haider and Arthur Smith of the Nanoscale and Quantum Phenomena Institute at Ohio University; Valeria Ferrari and Maria Andrea Barral of the Centro Atómico Constituyentes, GIyA, CNEA, San Martín, Buenos Aires, Argentina; and Pablo Ordejón, Centre d'Investigació en Nanociència i Nanotecnologia, Barcelona, Spain.

The research was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering (STM studies of nanoscale spintronic nitride systems), the National Science Foundation (advancing nanospintronics through international collaboration), CONICET, ANPCyT and Spanish MICINN. The Ohio Supercomputing Center provided computer time.

####

For more information, please click here

Contacts:
Arthur Smith
(740) 597-2576


Andrea Gibson
(740) 597-2166

Copyright © Ohio University

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

SEMATECH to Showcase Innovation and Advances in Manufacturing at SEMICON Japan 2014: SEMATECH experts will share the latest techniques, emerging trends and best practices in advanced manufacturing strategies and methodologies November 26th, 2014

Australian startup creates world’s first 100% cotton hydrophobic T-Shirts November 26th, 2014

The mysterious 'action at a distance' between liquid containers November 26th, 2014

'Giant' charge density disturbances discovered in nanomaterials: Juelich researchers amplify Friedel oscillations in thin metallic films November 26th, 2014

Research yields material made of single-atom layers that snap together like Legos November 25th, 2014

Physics

The mysterious 'action at a distance' between liquid containers November 26th, 2014

Govt.-Legislation/Regulation/Funding/Policy

Lawrence Livermore researchers develop efficient method to produce nanoporous metals November 25th, 2014

Renishaw receives Queen's Award for spectroscopy developments November 25th, 2014

Vegetable oil ingredient key to destroying gastric disease bacteria: In mice, therapeutic nanoparticles dampen H. pylori bacteria and inflammation that lead to ulcers and gastric cancer November 25th, 2014

Research yields material made of single-atom layers that snap together like Legos November 25th, 2014

Spintronics

'Giant' charge density disturbances discovered in nanomaterials: Juelich researchers amplify Friedel oscillations in thin metallic films November 26th, 2014

Researchers create & control spin waves, lifting prospects for enhanced info processing November 17th, 2014

Pseudospin-driven spin relaxation mechanism in graphene November 11th, 2014

New Electron Spin Secrets Revealed November 10th, 2014

Chip Technology

SEMATECH to Showcase Innovation and Advances in Manufacturing at SEMICON Japan 2014: SEMATECH experts will share the latest techniques, emerging trends and best practices in advanced manufacturing strategies and methodologies November 26th, 2014

'Giant' charge density disturbances discovered in nanomaterials: Juelich researchers amplify Friedel oscillations in thin metallic films November 26th, 2014

Nanometrics Announces Upcoming Investor Events November 19th, 2014

A novel method for identifying the body’s ‘noisiest’ networks November 19th, 2014

Discoveries

The mysterious 'action at a distance' between liquid containers November 26th, 2014

'Giant' charge density disturbances discovered in nanomaterials: Juelich researchers amplify Friedel oscillations in thin metallic films November 26th, 2014

Vegetable oil ingredient key to destroying gastric disease bacteria: In mice, therapeutic nanoparticles dampen H. pylori bacteria and inflammation that lead to ulcers and gastric cancer November 25th, 2014

Research yields material made of single-atom layers that snap together like Legos November 25th, 2014

Announcements

SEMATECH to Showcase Innovation and Advances in Manufacturing at SEMICON Japan 2014: SEMATECH experts will share the latest techniques, emerging trends and best practices in advanced manufacturing strategies and methodologies November 26th, 2014

Australian startup creates world’s first 100% cotton hydrophobic T-Shirts November 26th, 2014

The mysterious 'action at a distance' between liquid containers November 26th, 2014

'Giant' charge density disturbances discovered in nanomaterials: Juelich researchers amplify Friedel oscillations in thin metallic films November 26th, 2014

Grants/Awards/Scholarships/Gifts/Contests/Honors/Records

Renishaw receives Queen's Award for spectroscopy developments November 25th, 2014

A*STAR SIMTech wins international award for breaking new ground in actuators: SIMTech invention can be used in an array of industries, and is critical for next generation ultra-precision systems November 24th, 2014

SUNY Poly Student Awarded Fellowship with the U.S. Department of Energy's Postgraduate Research Program: Ph.D. Candidate Accepts Postmaster's Appointment To Conduct Research At Albany NanoTech Complex November 13th, 2014

MEMS Industry Group's 10th Annual Executive Conference Showcases Rapid Innovation in MEMS/Sensors: Emphasizes Spirit of Collaboration, Supporting First Open-Source Algorithm Community, New Standardization Efforts November 10th, 2014

Research partnerships

SEMATECH to Showcase Innovation and Advances in Manufacturing at SEMICON Japan 2014: SEMATECH experts will share the latest techniques, emerging trends and best practices in advanced manufacturing strategies and methodologies November 26th, 2014

The mysterious 'action at a distance' between liquid containers November 26th, 2014

Lawrence Livermore researchers develop efficient method to produce nanoporous metals November 25th, 2014

Vegetable oil ingredient key to destroying gastric disease bacteria: In mice, therapeutic nanoparticles dampen H. pylori bacteria and inflammation that lead to ulcers and gastric cancer November 25th, 2014

Quantum nanoscience

The mysterious 'action at a distance' between liquid containers November 26th, 2014

Cooling with the coldest matter in the world November 24th, 2014

Quantum mechanical calculations reveal the hidden states of enzyme active sites November 20th, 2014

Pseudospin-driven spin relaxation mechanism in graphene November 11th, 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