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

Oregon researchers glimpse pathway of sunlight to electricity: Collaboration with Lund University uses modified UO spectroscopy equipment to study 'maze' of connections in photoactive quantum dots December 19th, 2014

Instant-start computers possible with new breakthrough December 19th, 2014

Aculon Hires New Business Development Director December 19th, 2014

Iranian Scientists Use Nanotechnology to Increase Power, Energy of Supercapacitors December 18th, 2014

Physics

SUNY Poly NanoCollege Faculty Member Selected as American Physical Society Fellow: SUNY Poly Associate Professor of Nanoscience Dr. Vincent LaBella Recognized for Significant Technological Innovations that Enable Interactive Learning December 17th, 2014

Fraud-proof credit card possible because of quantum physics December 16th, 2014

Nanoscale resistors for quantum devices: The electrical characteristics of new thin-film chromium oxide resistors that can be tuned by controlling the oxygen content detailed in the 'Journal of Applied Physics' December 9th, 2014

Unusual Electronic State Found in New Class of Unconventional Superconductors: Finding gives scientists a new group of materials to explore to unlock secrets of some materials' ability to carry current with no energy loss December 8th, 2014

Govt.-Legislation/Regulation/Funding/Policy

Oregon researchers glimpse pathway of sunlight to electricity: Collaboration with Lund University uses modified UO spectroscopy equipment to study 'maze' of connections in photoactive quantum dots December 19th, 2014

Zenosense, Inc. - Hospital Collaboration - 400 Person Lung Cancer Detection Trial December 17th, 2014

SUNY Poly NanoCollege Faculty Member Selected as American Physical Society Fellow: SUNY Poly Associate Professor of Nanoscience Dr. Vincent LaBella Recognized for Significant Technological Innovations that Enable Interactive Learning December 17th, 2014

Switching to spintronics: Berkeley Lab reports on electric field switching of ferromagnetism at room temp December 17th, 2014

Spintronics

Switching to spintronics: Berkeley Lab reports on electric field switching of ferromagnetism at room temp December 17th, 2014

Pb islands in a sea of graphene magnetise the material of the future December 16th, 2014

'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

Chip Technology

Instant-start computers possible with new breakthrough December 19th, 2014

Switching to spintronics: Berkeley Lab reports on electric field switching of ferromagnetism at room temp December 17th, 2014

Pb islands in a sea of graphene magnetise the material of the future December 16th, 2014

Stanford team combines logic, memory to build a 'high-rise' chip: Today circuit cards are laid out like single-story towns; Futuristic architecture builds layers of logic and memory into skyscraper chips that would be smaller, faster, cheaper -- and taller December 15th, 2014

Discoveries

Oregon researchers glimpse pathway of sunlight to electricity: Collaboration with Lund University uses modified UO spectroscopy equipment to study 'maze' of connections in photoactive quantum dots December 19th, 2014

Instant-start computers possible with new breakthrough December 19th, 2014

Creation of 'Rocker' protein opens way for new smart molecules in medicine, other fields December 18th, 2014

Iranian Scientists Use Nanotechnology to Increase Power, Energy of Supercapacitors December 18th, 2014

Announcements

Oregon researchers glimpse pathway of sunlight to electricity: Collaboration with Lund University uses modified UO spectroscopy equipment to study 'maze' of connections in photoactive quantum dots December 19th, 2014

Instant-start computers possible with new breakthrough December 19th, 2014

Aculon Hires New Business Development Director December 19th, 2014

Iranian Scientists Use Nanotechnology to Increase Power, Energy of Supercapacitors December 18th, 2014

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

SUNY Poly NanoCollege Faculty Member Selected as American Physical Society Fellow: SUNY Poly Associate Professor of Nanoscience Dr. Vincent LaBella Recognized for Significant Technological Innovations that Enable Interactive Learning December 17th, 2014

“Line dancing bacteria win the 2014 Dolomite and Lab on a Chip Video Competition” December 16th, 2014

Lifeboat Foundation gives 2014 Guardian Award to Elon Musk December 16th, 2014

UCLA engineers first to detect and measure individual DNA molecules using smartphone microscope December 15th, 2014

Research partnerships

Oregon researchers glimpse pathway of sunlight to electricity: Collaboration with Lund University uses modified UO spectroscopy equipment to study 'maze' of connections in photoactive quantum dots December 19th, 2014

Unraveling the light of fireflies December 17th, 2014

Scientists trace nanoparticles from plants to caterpillars: Rice University study examines how nanoparticles behave in food chain December 16th, 2014

FEI and Oregon Health & Science University Install a Complete Correlative Microscopy Workflow in Newly Built Collaborative Science Facility December 16th, 2014

Quantum nanoscience

Fraud-proof credit card possible because of quantum physics December 16th, 2014

Nanoscale resistors for quantum devices: The electrical characteristics of new thin-film chromium oxide resistors that can be tuned by controlling the oxygen content detailed in the 'Journal of Applied Physics' December 9th, 2014

High photosensitivity 2D-few-layered molybdenum diselenide phototransistors December 8th, 2014

Electron pairs on demand: Controlled emission and spatial splitting of electron pairs demonstrated December 4th, 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