Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Counting on Neodymium

Using the tip of a scanning tunnelling microscope (above), which is only a few atoms in size, the researchers conducted electric current through a magnetic double-decker molecule placed on a copper layer. A neodymium atom (red) is located at the centre of the molecule. Source: Forschungszentrum Jülich
Using the tip of a scanning tunnelling microscope (above), which is only a few atoms in size, the researchers conducted electric current through a magnetic double-decker molecule placed on a copper layer. A neodymium atom (red) is located at the centre of the molecule.

Source: Forschungszentrum Jülich

Abstract:
Magnetic molecules are regarded as promising functional units for the future of information processing. An interdisciplinary team of researchers from Jülich and Aachen were the first to produce particularly robust magnetic molecules that enable a direct electrical readout of magnetic information. This was made possible by selecting the rare earth metal neodymium as the central building block of the molecule. The team's research findings were published online today in the renowned journal Nature Communications.

Counting on Neodymium

Juelich, Germany | Posted on September 24th, 2013

The miniaturization of processors is approaching the limits of what is physically possible. At the same time, the global energy consumption by information and communications technologies is increasing continuously, requiring new approaches to handle the growing volume of data. Magnetic molecules provide a solution to this problem. They could take the place of conventional electronic components, such as diodes or transistors. In contrast to these components, however, they can be controlled with minimal voltage - which drastically reduces energy consumption - and have much more sophisticated switching functions that depend on the magnetism of the molecules.

Magnetic molecules act as tiny magnets and are able to process information in the form of electrical signals. They always have the same number of atoms, can be designed specifically for various functions, and can be produced cost-effectively in an identical form over and over again. In order to use this ‘molecular spintronics' in technical applications, the magnetic structure of the molecules must be effectively shielded from environmental influences, but at the same time, it must be accessible to electric current.

"You could say that electric current and magnetism have to communicate with each other," says Dr. Daniel Bürgler from Forschungszentrum Jülich and the Jülich Aachen Research Alliance. The physicist's team, located in Jülich and Aachen, has produced a molecule that fulfils these requirements: "In neodymium phthalocyanine, the same electrons that give rise to magnetism are also involved in electronic transport," explains Bürgler. The researchers were able to demonstrate this by comparing simulated data to experimental values.

The metal neodymium is a rare earth metal. Molecules comprising rare earth atoms and phthalocyanines, which can be found in nature in the form of leaf pigments, are considered particularly stable and shield the magnetic state of the central rare earth atoms very effectively. However, electrical readout of the magnetic state directly from these molecules had failed in the past. Due to the electrical contacting of these molecules, the electric current was hardly influenced by the magnetic structure.

In order to identify a suitable rare earth atom, the researchers first analysed the distribution of the electrons flying about the atoms like a cloud. Only some of the electrons produce the magnetic structure. These must be situated sufficiently deep within the electron cloud to be unaffected by environmental influences. At the same time, they must not be located so deep as to prevent interaction with the electrons conducting electric current. Neodymium fulfils these requirements, because it is more lightweight than other lanthanides and its electrons are distributed within a larger cloud.

Full bibliographic information

Accessing 4f-states in single-molecule spintronics; S. Fahrendorf et al.; Nature Communications, published online 24 September 2013 DOI: 10.1038/ncomms3425.

####

About Forschungszentrum Juelich
The Future is Our Mission: this is the common denominator to which Research Centre Juelich, one of the 15 Helmholtz Research Centres in Germany, reduces its work.

For more information, please click here

Contacts:
Angela Wenzik
Forschungszentrum Jülich
+49 2461 61-6048

Copyright © AlphaGalileo

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

Jülich Aachen Research Alliance – Fundamentals of Future Information Technology:

Peter Grünberg Institute – Electronic Properties (PGI-6):

Peter Grünberg Institute and Institute for Advanced Simulation – Quantum Theory of Materials (PGI-1/IAS-1):

Institute of Inorganic Chemistry – Molecular Magnetism (in German):

Related News Press

News and information

Smallest possible diamonds form ultra-thin nanothreads: Diamond nanothreads are likely to have extraordinary properties, including strength and stiffness greater than that of today's strongest nanotubes and polymers September 22nd, 2014

Engineers show light can play seesaw at the nanoscale: Discovery is another step toward faster and more energy-efficient optical devices for computation and communication September 22nd, 2014

New chip promising for tumor-targeting research September 22nd, 2014

Twisted graphene chills out: When two sheets of graphene are stacked in a special way, it is possible to cool down the graphene with a laser instead of heating it up, University of Manchester researchers have shown September 22nd, 2014

Physics

Toward optical chips: A promising light source for optoelectronic chips can be tuned to different frequencies September 19th, 2014

Elusive Quantum Transformations Found Near Absolute Zero: Brookhaven Lab and Stony Brook University researchers measured the quantum fluctuations behind a novel magnetic material's ultra-cold ferromagnetic phase transition September 15th, 2014

Laboratories

Elusive Quantum Transformations Found Near Absolute Zero: Brookhaven Lab and Stony Brook University researchers measured the quantum fluctuations behind a novel magnetic material's ultra-cold ferromagnetic phase transition September 15th, 2014

'Squid skin' metamaterials project yields vivid color display: Rice lab creates RGB color display technology with aluminum nanorods September 15th, 2014

Berkeley Lab Licenses Boron Nitride Nanotube Technology: New material has unique mechanical and electronic properties September 13th, 2014

Chip Technology

Twisted graphene chills out: When two sheets of graphene are stacked in a special way, it is possible to cool down the graphene with a laser instead of heating it up, University of Manchester researchers have shown September 22nd, 2014

SouthWest NanoTechnologies (SWeNT) Receives NIST Small Business Innovation Research (SBIR) Phase 1 Award to Produce Greater than 99% Semiconducting Single-Wall Carbon Nanotubes September 19th, 2014

Toward optical chips: A promising light source for optoelectronic chips can be tuned to different frequencies September 19th, 2014

IEEE International Electron Devices Meeting To Celebrate 60th Anniversary as The Leading Technical Conference for Advanced Semiconductor Devices September 18th, 2014

Discoveries

Smallest possible diamonds form ultra-thin nanothreads: Diamond nanothreads are likely to have extraordinary properties, including strength and stiffness greater than that of today's strongest nanotubes and polymers September 22nd, 2014

Engineers show light can play seesaw at the nanoscale: Discovery is another step toward faster and more energy-efficient optical devices for computation and communication September 22nd, 2014

New chip promising for tumor-targeting research September 22nd, 2014

Twisted graphene chills out: When two sheets of graphene are stacked in a special way, it is possible to cool down the graphene with a laser instead of heating it up, University of Manchester researchers have shown September 22nd, 2014

Announcements

Engineers show light can play seesaw at the nanoscale: Discovery is another step toward faster and more energy-efficient optical devices for computation and communication September 22nd, 2014

New chip promising for tumor-targeting research September 22nd, 2014

Twisted graphene chills out: When two sheets of graphene are stacked in a special way, it is possible to cool down the graphene with a laser instead of heating it up, University of Manchester researchers have shown September 22nd, 2014

New star-shaped molecule breakthrough: Scientists at The University of Manchester have generated a new star-shaped molecule made up of interlocking rings, which is the most complex of its kind ever created September 22nd, 2014

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

Smallest possible diamonds form ultra-thin nanothreads: Diamond nanothreads are likely to have extraordinary properties, including strength and stiffness greater than that of today's strongest nanotubes and polymers September 22nd, 2014

Engineers show light can play seesaw at the nanoscale: Discovery is another step toward faster and more energy-efficient optical devices for computation and communication September 22nd, 2014

Twisted graphene chills out: When two sheets of graphene are stacked in a special way, it is possible to cool down the graphene with a laser instead of heating it up, University of Manchester researchers have shown September 22nd, 2014

New star-shaped molecule breakthrough: Scientists at The University of Manchester have generated a new star-shaped molecule made up of interlocking rings, which is the most complex of its kind ever created September 22nd, 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