Subscribe to our free daily newsletters
. 24/7 Space News .




Subscribe to our free daily newsletters



TECH SPACE
Pushing the boundaries of magnet design
by Staff Writers
Washington DC (SPX) Oct 20, 2016


File image.

For physicists, loss of magnetisation in permanent magnets can be a real concern. In response, the Japanese company Sumitomo created the strongest available magnet--one offering ten times more magnetic energy than previous versions - in 1983. These magnets are a combination of materials including rare-earth metal and so-called transition metals, and are accordingly referred to as RE-TM-B magnets.

A Russian team has now been pushing the boundaries of magnet design, as published in a recent study in EPJ Plus. They have developed methods to counter the spontaneous loss of magnetisation, based on their understanding of the underlying physical phenomenon.

Roman Morgunov from the Institute of Problems of Chemical Physics at the Russian Academy of Sciences and colleagues have now developed a simple additive-based method for ensuring the stability of permanent magnets over time, with no loss to their main magnetic characteristics.

To design magnets that retain their magnetic stability, the authors altered the chemical composition of a RE-TM-B magnet. Their method consists in inserting small amounts of Samarium atoms at random places within the crystalline sub-lattice of the magnet's rare-earth component.

They observed a multi-fold increase in the magnet's stability over time with as little as 1% Samarium. The advantage of using such low quantity of additives to stabilise the magnet is that it does not alter the magnetic properties.

The authors believe this result is linked to Samarium's symmetry. It differs from the crystalline structure of Dysprosium atoms, which enter the composition of the magnet's rare-earth component.

As a result, spontaneous magnetisation no longer takes place. This is because the potential barriers separating the magnetisation states of different energies are enhanced by the disrupted symmetry.

Further developments of this research will most likely focus on identifying the discrete magnetisation jumps--elementary events that initiate the reversible magnetisation, leading to a loss in stability.

Reference: R. B. Morgunov, E. I. Kunitsyna, V. V. Kucheryaev, V. P. Piskorskii, O. G. Ospennikova, E. N. Kablov (2016), Giant effect of Sm atoms on time stability of (NdDy)(FeCo)B magnet, European Physical Journal Plus 131:344 (2016), DOI 10.1140/epjp/i2016-16344-7


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

.


Related Links
Springer
Space Technology News - Applications and Research






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

Previous Report
TECH SPACE
Chemists design organic molecules that glow persistently at room temperature
Washington DC (SPX) Oct 31, 2016
LEDs have inspired a new generation of electronics, but there is still work ahead if we want luminescent materials to consume less energy and have longer lifespans. Certain inorganic metals seem promising, but they are rare, expensive to process, and potentially toxic. In Chem on October 13, researchers in China present an alternative: a group of metal-free phosphorescent molecules that ef ... read more


TECH SPACE
NASA Shakes Up Orion Test Article for the Journey to Mars

Beaches, skiing and tai chi: Club Med, Chinese style

NASA begins tests to qualify Orion parachutes for mission with crew

New Zealand government open-minded on space collaboration

TECH SPACE
Boosting Europe's all-electric satellites

Guiding Supply Ship to the International Space Station

The Pressure is On for SLS Hardware in Upcoming Test

First launch for Orbital's Antares rocket since '14 blast

TECH SPACE
Did it crash or land? Search on for Europe's Mars craft

Rover Conducting Science Investigations at 'Spirit Mount'

MAVEN mission observes ups and downs of water escape from Mars

A graveyard of broken dreams and landers

TECH SPACE
China to enhance space capabilities with launch of Shenzhou-11

Ambitious space satellite projects set for liftoff

China's permanent station plans ride on mission

China to enhance space capabilities with launch of Shenzhou-11

TECH SPACE
Airbus DS contracts with Intelsat General for European Defence Communications

Final exams prepare Thomas Pesquet for launch

Airbus DS in partnership with Orbital ATK to build EUTELSAT 5 West B

Third party satellite launch order bookings for Isro stands at $42 million

TECH SPACE
Pushing the boundaries of magnet design

The smart wheelchair

Using Photonics to Call Home

Researchers find way to tune thermal conductivity of 2-D materials

TECH SPACE
Oldest known planet-forming disk found

ALMA spots possible formation site of icy giant planet

Astronomers find oldest known planetary disk

Proxima Centauri might be more sunlike than we thought

TECH SPACE
Uranus may have two undiscovered moons

Possible Clouds on Pluto, Next Target is Reddish

Curious tilt of the Sun traced to undiscovered planet

Shedding light on Pluto's glaciers




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement