Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Magnetic Vortex Switch Leads to Electric Pulse

Abstract:
Researchers at the University of Arkansas have shown that changing the chirality, or direction of spin, of a nanoscale magnetic vortex creates an electric pulse, suggesting that such a pulse might be of use in creating computer memory and writing information.

Magnetic Vortex Switch Leads to Electric Pulse

Fayetteville, AR | Posted on April 8th, 2009

Physicists Sergey Prosandeev and Laurent Bellaiche reported their findings in Physical Review Letters.

"This is new physics," Prosandeev said. "There are many possibilities that can follow from this."

The researchers looked at ferromagnets, a class of materials with novel properties at the nanoscale that have the potential to create new, efficient devices. They focused on the recently discovered vortex structure found at the nanoscale, investigating if a possible electric field can be generated when the vortex changes chirality.

"We change the magnetic structure but measure the associated electric field," Prosandeev said.

They found that switching the direction of the vortex from clockwise to counterclockwise produced a positive electric pulse - and that switching the vortex in the opposite direction created an electric pulse with a negative sign. The resulting electric pulse can thus serve as the fingerprint indicating that switches of vortices did occur, as such a switch is difficult to directly observe.

Switching of some physical properties such as polarization or magnetization currently is used in computer memory and writing and storing information, but because of the larger scale, it requires more energy and materials. Being able to create switches of vortices with less material and energy could create more efficient devices.

The researchers have derived a formula showing the relationship between the magnetic vortex and the electric pulse and have shown how it occurs graphically over time. The next step will be experiments to see this phenomenon in action.

"Theoreticians show what can be the next step," Prosandeev said. "These relationships can then be applied to technology."

####

About University of Arkansas
The University of Arkansas, often shortened to U of A or just UA, is a public co-educational land-grant university. It is the flagship campus of the University of Arkansas System and is located in Fayetteville, Arkansas. Founded as Arkansas Industrial University in 1871, its present name was adopted in 1899 and classes were first held in February 1872. It is noted for its strong architecture, agriculture (particularly poultry science),[4] creative writing and business programs.[5] It is also noted for the fact that University of Arkansas engineering students won the 2006 world championship for solar-powered boats.

Source: Wikipedia, the free encyclopedia

For more information, please click here

Contacts:
Sergey Prosandeev, research professor, physics
J. William Fulbright College of Arts and Sciences
479-575-6668,

Laurent Bellaiche, Twenty-First Century Endowed Professorship in Nanotechnology and Science Education, and professor of physics
J. William Fulbright College of Arts and Sciences
479-575-6425,

Melissa Lutz Blouin, director of science and research communications
University Relations
479-575-5555,

Copyright © University of Arkansas

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

Possible Futures

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

Researchers discern the shapes of high-order Brownian motions November 17th, 2014

VDMA Electronics Production Equipment: Growth track for 2014 and 2015 confirmed: Business climate survey shows robust industry sector November 14th, 2014

Open Materials Development Will Be Key for HP's Success in 3D Printing: HP can make a big splash in 3D printing, but it needs to shore up technology claims and avoid the temptation of the razor/razor blade business model in order to flourish November 11th, 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

Memory 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

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

Graphene layer reads optical information from nanodiamonds electronically: Possible read head for quantum computers December 1st, 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

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