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




Subscribe to our free daily newsletters



CHIP TECH
Imaging how magnetism goes surfing
by Staff Writers
Mainz, Germany (SPX) Oct 10, 2017


illustration only

Controlling the magnetic properties of materials is fundamental for developing memory, computing and communication devices at the nanoscale. As data storage and processing are evolving quickly, researchers are testing different new methods to modify magnetic properties of materials. One approach relies on elastic deformation (strain) of the magnetic material to tune its magnetic properties, which can be achieved by electric fields.

This scientific area has attracted much interest due to its potential to write small magnetic elements with a low power electric field rather than magnetic fields that require high power charge currents. However, studies so far have mainly been done at very slow time scales (seconds to milliseconds).

One way to produce rapid (i.e. subnanosecond scale) changes of strain and, thus, induce magnetization changes is by using surface acoustic waves (SAWs), which are deformation (strain) waves. Now, imagine an iron rod being hammered in one side. When the rod is hit, a sound wave propagates the deformation along it.

Similarly, a surface acoustic wave propagates a deformation, but only in the surface layer, similarly to waves in the ocean. In certain materials (piezoelectrics), which expand or contract when applying a voltage, SAWs can be generated through oscillating electric fields.

In a collaboration with groups from Spain, Switzerland and Berlin, the group of M. Klaui at JGU has used a new experimental technique to quantitatively image these SAW and demonstrate that they can be used to switch the magnetization in nanoscale magnetic elements (the "surfers") on top of the crystal.

Results showed that the magnetic squares changed their properties under the effect of SAWs, growing or shrinking the magnetic domains depending on the phase of the SAW. Interestingly, the deformation did not occur instantaneously and the observed delay (see Figure 1) could be modelled. Understanding how the magnetic properties can be modified on a fast time scale is key to design low power magnetic devices in the future.

"For highly complex measurements, close international cooperation with leading groups and a strong Alumni network are a strategical advantage. We have teamed up with a group from the Synchrotron Radiation Source ALBA in Spain where a former PhD student from our group is working and leading this project. The work was carried out also in conjunction with a PhD student from the MAINZ Graduate School of Excellence and it is great to see that our students and alumni are so successful." emphasized Professor Mathias Klaui of the JGU Institute of Physics, who is also Director of MAINZ.

Establishment of the MAINZ Graduate School was granted through the Excellence Initiative by the German Federal and State Governments to Promote Science and Research at German Universities in 2007 and its funding was extended in the second round in 2012. It consists of work groups from Johannes Gutenberg University Mainz, TU Kaiserslautern, and the Max Planck Institute for Polymer Research in Mainz. One of its focal research areas is spintronics, where cooperation with leading international partners plays an important role.

Research Report: "Direct imaging of delayed magneto dynamic modes induced by surface acoustic waves" M. Foerster, F. Macia, N. Statuto, S. Finizio, A. Hernandez-Minguez, S. Lendinez, P. Santos, J. Fontcuberta, J. M. Hernandez, M. Klaui, L. Aballe Nature Communications 8, 407 (2017)

CHIP TECH
Columbia engineers invent breakthrough millimeter-wave circulator IC
New York, NY (SPX) Oct 09, 2017
Columbia Engineering researchers, led by Harish Krishnaswamy, associate professor of electrical engineering, in collaboration with Professor Andrea Alu's group from UT-Austin, continue to break new ground in developing magnet-free non-reciprocal components in modern semiconductor processes. At the IEEE International Solid-State Circuits Conference in February, Krishnaswamy's group unveiled a new ... read more

Related Links
Johannes Gutenberg Universitaet Mainz
Computer Chip Architecture, Technology and Manufacture
Nano Technology News From SpaceMart.com


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

Comment using your Disqus, Facebook, Google or Twitter login.

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

CHIP TECH
USNO Astronomers Measure New Distances To Nearby Stars

OECD calls for tourism to be more sustainable

Alaska antenna to improve NASA's space communications system

Fast-moving space industries create new ethical challenges

CHIP TECH
Arianespace to launch COSMO-SkyMed satellites manufactured by Thales

New Zealand opens first rocket launch site

Arianespace signs contract for 10 Vega and Vega C launchers

Launch Vehicle and Missile Ascent Trajectories

CHIP TECH
Lockheed Martin Reveals New Details to its Mars Base Camp Vision

Fresh Look at Old Data Yields Surprise Near Martian Equator

Methane belches kept water flowing on ancient Mars

Large Solar Storm Sparks Global Aurora and Doubles Radiation Levels on the Martian Surface

CHIP TECH
China launches three satellites

Mars probe to carry 13 types of payload on 2020 mission

UN official commends China's role in space cooperation

China's cargo spacecraft separates from Tiangong-2 space lab

CHIP TECH
GomSpace and Luxembourg to develop space activities in the Grand Duchy

Private companies are launching a new space race

L-Band Satellite Operators Need To Reposition

Spacepath Communications Acquires Tango Wave

CHIP TECH
Microlasers get a performance boost from a bit of gold

Students, researchers turn algae into renewable flip-flops

New test opens path for better 2-D catalysts

CONFERS to Establish "Rules of the Road" for On-Orbit Servicing of Satellites

CHIP TECH
MATISSE to Shed Light on the Formation of Earth and Planets

Glenn Tests Thruster Bound for Metal World

Searching for Distant Worlds With a Flying Telescope

Scientists propose new concept of terrestrial planet formation

CHIP TECH
Helicopter test for Jupiter icy moons radar

Solving the Mystery of Pluto's Giant Blades of Ice

Global Aerospace Corporation to present Pluto lander concept to NASA

Pluto features given first official names




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