Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > A highway for spin waves: Researchers in Dresden develop process for controlling innovative information media

The spin wave remains trapped in the domain wall, which is formed in the middle between the differently oriented magnetizations. Researchers at the HZDR could thus control its propagation purposefully.
CREDIT: HZDR / H. Schulthei▀
The spin wave remains trapped in the domain wall, which is formed in the middle between the differently oriented magnetizations. Researchers at the HZDR could thus control its propagation purposefully.

CREDIT: HZDR / H. Schulthei▀

Abstract:
The success story of information processing by way of moving electrons is slowly coming to an end. The trend towards more and more compact chips constitutes a major challenge for manufacturers, since the increasing miniaturization creates partly unsolvable physical problems. This is why magnetic spin waves could be the future: they are faster than electronic charge carriers and use less power. Researchers at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) and TU Dresden have developed a method for controlling the propagation of these information carriers at the nanolevel in a targeted and simple way; so far, this required a lot of power. They have thus created a basis for nanocircuits that use spin waves.

A highway for spin waves: Researchers in Dresden develop process for controlling innovative information media

Dresden, Germany | Posted on February 1st, 2016

"Our current information processing is based on electrons," explains Dr. Helmut Schulthei▀ from the HZDR's Institute of Ion Beam Physics and Materials Research. "These charged particles flow through the wires, creating electric currents. Yet in the process they collide with atoms and lose energy, which escapes into the crystal lattice in the form of heat. This means that chips get all the warmer, the closer the elements on them are grouped together. Eventually they fail, because the heat cannot be conveyed anymore." This is why Schulthei▀, head of an Emmy Noether Junior Research Group, pursues a different approach: information transport via spin waves, also known as magnons.

The magnetic moment of electrons

Spin is the term scientists use to describe the angular momentum of electrons revolving around their own axis. It makes the electric particles behave like extremely small magnets. This is why they align in a parallel manner in ferromagnetic materials. "If one guides a spin in a different direction, this will have an impact also on the neighboring spins," Schulthei▀ explains. "This creates a spin wave that travels through the solid body. It can be used to transport and process information just like flowing charge carriers." However, the electrons themselves do not move in this case. "They do not collide with anything and therefore generate hardly any heat."

Yet in order to prevail in the race for future information processing methods, systems are needed that allow for controlling the propagation of spin waves at the nanolevel. "So far, approaches to a solution were based either on geometrically predefined conductor paths or on the permanent use of external magnetic fields," says Schulthei▀, explaining the current state of research. "In the case of the first solution, the propagation path cannot be changed; however this is necessary for the development of flexible circuits. The second method solves that problem, yet at the price of an enormous increase in power consumption."

Controlled propagation path

The scientists have successfully developed a new procedure for the targeted steering of spin waves by utilizing basic magnetic characteristics: remanence, that is, the residual magnetism that a solid body retains after the removal of a magnetic field, and the formation of so-called domain walls. "This term denotes the area in solid bodies where differently aligned magnetic domains meet," Schulthei▀ explains. The HZDR researchers created such a domain wall within a nickel-iron alloy nanostructure in an experiment. They then triggered a spin wave using microwaves. As their tests have shown, the spin waves of a certain frequency got stuck in the domain wall, because the different magnetic domains act as barriers. "In a sense, one could say that we created a road with a crash barrier along which the spin waves travel in a controlled manner," Schulthei▀ cheerfully describes the result.

However, the Dresden physicists were able to celebrate yet another success. They manipulated the course of the domain wall by way of small external magnetic fields of far below one millitesla, about one hundred times weaker than a commercial horseshoe magnet. In doing so, they likewise manipulated the propagation of the spin waves. "This could be the basis for a design of reconfigurable nanocircuits that uses magnons," Schulthei▀ says, sizing up the options. Even so, the researcher thinks that several years are likely to pass before application. "We are still in the basic research phase. However, our results reveal that we are onto a good thing."

####

About Helmholtz-Zentrum Dresden-Rossendorf
The Helmholtz-Zentrum Dresden-Rossendorf (HZDR) conducts research in the sectors energy, health, and matter. It focuses its research on the following topics:

How can energy and resources be used efficiently, safely, and sustainably?
How can malignant tumors be visualized and characterized more precisely and treated effectively?
How do matter and materials behave in strong fields and in the smallest dimensions?
The HZDR has been a member of the Helmholtz Association, Germany's largest research organization, since 2011. It has four locations (Dresden, Leipzig, Freiberg, Grenoble) and employs about 1,100 people - approximately 500 of whom are scientists, including 150 doctoral candidates.

For more information, please click here

Contacts:
Simon Schmitt

49-351-260-3400

Further information:

Dr. Helmut Schulthei▀
Institute of Ion Beam Physics and Materials Research at HZDR
Phone +49 351 260-3243
Mail:

Copyright © Helmholtz-Zentrum Dresden-Rossendorf

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 Links

Publication:

Related News Press

News and information

Researchers identify structural changes that occur in enveloped viruses before invading host August 21st, 2018

Magnetic antiparticles offer new horizons for information technologies: Computer simulations reveal new behavior of antiskyrmions in gradually increased electric currents August 21st, 2018

Energy-efficient spin current can be controlled by magnetic field and temperature: SCMR effect simplifies the design of fundamental spintronic components August 20th, 2018

Color effects from transparent 3D printed nanostructures: New design tool automatically creates nanostructure 3D print templates for user-given colors Scientists present work at prestigious SIGGRAPH conference August 18th, 2018

Magnetism

Magnetic antiparticles offer new horizons for information technologies: Computer simulations reveal new behavior of antiskyrmions in gradually increased electric currents August 21st, 2018

Energy-efficient spin current can be controlled by magnetic field and temperature: SCMR effect simplifies the design of fundamental spintronic components August 20th, 2018

Possible Futures

Researchers identify structural changes that occur in enveloped viruses before invading host August 21st, 2018

Magnetic antiparticles offer new horizons for information technologies: Computer simulations reveal new behavior of antiskyrmions in gradually increased electric currents August 21st, 2018

Energy-efficient spin current can be controlled by magnetic field and temperature: SCMR effect simplifies the design of fundamental spintronic components August 20th, 2018

Color effects from transparent 3D printed nanostructures: New design tool automatically creates nanostructure 3D print templates for user-given colors Scientists present work at prestigious SIGGRAPH conference August 18th, 2018

Spintronics

Energy-efficient spin current can be controlled by magnetic field and temperature: SCMR effect simplifies the design of fundamental spintronic components August 20th, 2018

A colossal breakthrough for topological spintronics: BiSb expands the potential of topological insulators for ultra-low-power electronic devices August 2nd, 2018

Diamonds show promise for spintronic devices: New experiments demonstrate the potential for diamond as a material for spintronics January 30th, 2018

Researchers from TU Delft combine spintronics and nanophotonics in 2-D material January 25th, 2018

Chip Technology

Magnetic antiparticles offer new horizons for information technologies: Computer simulations reveal new behavior of antiskyrmions in gradually increased electric currents August 21st, 2018

Energy-efficient spin current can be controlled by magnetic field and temperature: SCMR effect simplifies the design of fundamental spintronic components August 20th, 2018

Smallest transistor worldwide switches current with a single atom in solid electrolyte: Milestone of energy efficiency in information technology -- Publication in Advanced Materials August 17th, 2018

Scientists create antilaser for ultracold atoms condensate August 16th, 2018

Discoveries

Researchers identify structural changes that occur in enveloped viruses before invading host August 21st, 2018

Magnetic antiparticles offer new horizons for information technologies: Computer simulations reveal new behavior of antiskyrmions in gradually increased electric currents August 21st, 2018

Energy-efficient spin current can be controlled by magnetic field and temperature: SCMR effect simplifies the design of fundamental spintronic components August 20th, 2018

Color effects from transparent 3D printed nanostructures: New design tool automatically creates nanostructure 3D print templates for user-given colors Scientists present work at prestigious SIGGRAPH conference August 18th, 2018

Announcements

Researchers identify structural changes that occur in enveloped viruses before invading host August 21st, 2018

Magnetic antiparticles offer new horizons for information technologies: Computer simulations reveal new behavior of antiskyrmions in gradually increased electric currents August 21st, 2018

Energy-efficient spin current can be controlled by magnetic field and temperature: SCMR effect simplifies the design of fundamental spintronic components August 20th, 2018

Color effects from transparent 3D printed nanostructures: New design tool automatically creates nanostructure 3D print templates for user-given colors Scientists present work at prestigious SIGGRAPH conference August 18th, 2018

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Researchers identify structural changes that occur in enveloped viruses before invading host August 21st, 2018

Magnetic antiparticles offer new horizons for information technologies: Computer simulations reveal new behavior of antiskyrmions in gradually increased electric currents August 21st, 2018

Energy-efficient spin current can be controlled by magnetic field and temperature: SCMR effect simplifies the design of fundamental spintronic components August 20th, 2018

Color effects from transparent 3D printed nanostructures: New design tool automatically creates nanostructure 3D print templates for user-given colors Scientists present work at prestigious SIGGRAPH conference August 18th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project