Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > New method of producing nanomagnets for information technology

The layer system of cobalt (bottom) and organic molecules can serve to store magnetic information that is indicated in the image by ones and zeros. The green and red arrows show the orientation of the spin.

Credit: Forschungszentrum Jülich
The layer system of cobalt (bottom) and organic molecules can serve to store magnetic information that is indicated in the image by ones and zeros. The green and red arrows show the orientation of the spin.

Credit: Forschungszentrum Jülich

Abstract:
An international team of researchers has found a new method of producing molecular magnets. Their thin layer systems made of cobalt and an organic material could pave the way for more powerful storage media as well as faster and more energy-efficient processors for information processing. The results of this research have been published in the current issue of the renowned journal Nature (DOI: 10.1038/nature11719).

New method of producing nanomagnets for information technology

Jülich, Germany | Posted on January 25th, 2013

In order to boost the performance of computers and reduce their energy requirements, processors and storage media have become smaller and smaller over the years. However, this strategy is about to reach the limits imposed by physics. Components that are too small are unstable, making them unsuitable for secure data storage and processing. One reason is that even one atom more or less can change the physical properties of components significantly that consist of only a few atoms. However, the exact number and arrangement of atoms can hardly be controlled in metals and semiconductors - the materials that electronic device components are made of today.

One way out of this dilemma could be so-called "molecular electronics", with nanometre-scale components made up of molecules. Molecules consist of a fixed number of atoms, can be designed specifically for various purposes, and can be produced cost-effectively in an identical form over and over again. If the magnetic moment of the electron - the "spin" - is also exploited in addition to its electric charge, it looks as though it may even be possible to implement entirely new functionalities, such as non-volatile RAM or quantum computers.

Molecules for such "molecular spintronics" must have specific magnetic properties. However, these properties are very sensitive and, so far, frequently become lost if the molecules are attached to inorganic materials, which are required for conducting electric current. This is why a team of researchers from Forschungszentrum Jülich, the University of Göttingen, Massachusetts Institute of Technology in the USA, Ruđer Bošković Institute in Croatia and IISER Kolkata in India pursued a new strategy exploiting the unavoidable interactions between the molecules and their substrate in a targeted manner to produce a hybrid layer that exhibits molecular magnetism and has the desired properties.

The researchers applied zinc methyl phenalenyl, or ZMP for short, a small metalorganic molecule which in itself is not magnetic, onto a magnetic layer of cobalt. They showed that ZMP forms a magnetic "sandwich" only in combination with the cobalt surface and that it can be selectively switched back and forth between two magnetic states using magnetic fields. In this process, the electrical resistance of the layer system changes by more than 20 %. In order to produce these "magnetoresistive" effects necessary to store, process, and measure data in molecular systems, researchers often required temperatures well below -200 °C.

"Our system is highly magnetoresistive at a comparatively high temperature of -20 °C. This is a considerable step forward on the way to developing molecular data storage and logic elements that work at room temperature," says Jülich scientist Dr. Nicolae Atodiresei, a theoretical physicist at the Peter Grünberg Institute and the Institute for Advanced Simulation. He and his Jülich colleagues played a major role in developing a physical model that explains the properties of this material with the help of calculations on supercomputers at Forschungszentrum Jülich.

"We now know that it is necessary for the molecule to be practically flat," says Atodiresei. "Two molecules then form a stack and attach themselves closely to the cobalt surface. The cobalt and the lower molecules then form the magnetic sandwich, while the upper molecule serves as a 'spin filter' and allows primarily those electrons to pass whose spin is suitably oriented." The orientation can be controlled by means of a magnetic field, for example. On the basis of their findings, the researchers are now planning to further optimize their sandwich system and modify it in such a way that the filter effect can also be controlled by electrical fields or light pulses.

Original publication:

Interface-engineered templates for molecular spin memory devices; K.V. Raman et al.; Nature (issue of 24.1.2013); DOI: 10.1038/nature11719

####

About Helmholtz Association of German Research Centres
The Helmholtz Association is dedicated to pursuing the long-term research goals of state and society, and to maintaining and improving the livelihoods of the population. In order to do this, the Helmholtz Association carries out top-level research to identify and explore the major challenges facing society, science and the economy. Its work is divided into six strategic research fields: Energy; Earth and Environment; Health; Key Technologies; Structure of Matter; and Aeronautics, Space and Transport. The Helmholtz Association brings together 18 scientific-technical and biological-medical research centres. With some 32,698 employees and an annual budget of approximately €3.4 billion, the Helmholtz Association is Germany’s largest scientific organisation. Its work follows in the tradition of the great natural scientist Hermann von Helmholtz (1821-1894).

About Forschungszentrum Jülich…

... pursues cutting-edge interdisciplinary research addressing pressing issues facing society today, above all the energy supply of the future. With its competence in materials science and simulation and its expertise in physics, nanotechnology and information technology, as well as in the biosciences and brain research, Jülich is developing the basis for the key technologies of tomorrow. Forschungszentrum Jülich helps to solve the grand challenges facing society in the fields of energy and the environment, health, and information technology. With almost 5000 employees, Jülich – a member of the Helmholtz Association – is one of the large interdisciplinary research centres in Europe.

For more information, please click here

Contacts:
Angela Wenzik
science journalist
Forschungszentrum Jülich
Germany

49-246-161-6048

Dr. Nicolae Atodiresei
Quantum Theory of Materials (PGI-1/IAS-1)
Forschungszentrum
Jülich, Germany
+49 2461 61-2859

Copyright © Helmholtz Association of German Research Centres

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

Forschungszentrum Jülich:

Quantum Theory of Materials (PGI-1/IAS-1):

University of Göttingen:

and:

Massachusetts Institute of Technology:

and:

and:

Ruđer Bošković Institute:

IISER Kolkata:

Related News Press

News and information

NanoTechnology for Defense (NT4D) October 22nd, 2014

Mechanism behind nature's sparkles revealed October 22nd, 2014

TARA Biosystems and Harris & Harris Group Form Company to Improve Safety and Efficacy of New Therapies October 22nd, 2014

Researchers patent a nanofluid that improves heat conductivity October 22nd, 2014

Laboratories

Super stable garnet ceramics may be ideal for high-energy lithium batteries October 21st, 2014

Could I squeeze by you? Ames Laboratory scientists model molecular movement within narrow channels of mesoporous nanoparticles October 21st, 2014

HP Supercomputer at NREL Garners Top Honor October 19th, 2014

ORNL research reveals unique capabilities of 3-D printing October 15th, 2014

Chip Technology

Materials for the next generation of electronics and photovoltaics: MacArthur Fellow develops new uses for carbon nanotubes October 21st, 2014

Nitrogen Doped Graphene Characterized by Iranian, Russian, German Scientists October 21st, 2014

Crystallizing the DNA nanotechnology dream: Scientists have designed the first large DNA crystals with precisely prescribed depths and complex 3D features, which could create revolutionary nanodevices October 20th, 2014

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Memory Technology

Superconducting circuits, simplified: New circuit design could unlock the power of experimental superconducting computer chips October 18th, 2014

Future computers could be built from magnetic 'tornadoes' October 14th, 2014

Research mimics brain cells to boost memory power September 30th, 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

Discoveries

Mechanism behind nature's sparkles revealed October 22nd, 2014

Researchers patent a nanofluid that improves heat conductivity October 22nd, 2014

‘Designer’ nanodevice could improve treatment options for cancer sufferers October 22nd, 2014

Detecting Cancer Earlier is Goal of Rutgers-Developed Medical Imaging Technology: Rare earth nanocrystals and infrared light can reveal small cancerous tumors and cardiovascular lesions October 21st, 2014

Announcements

NanoTechnology for Defense (NT4D) October 22nd, 2014

Mechanism behind nature's sparkles revealed October 22nd, 2014

TARA Biosystems and Harris & Harris Group Form Company to Improve Safety and Efficacy of New Therapies October 22nd, 2014

Researchers patent a nanofluid that improves heat conductivity October 22nd, 2014

Research partnerships

Detecting Cancer Earlier is Goal of Rutgers-Developed Medical Imaging Technology: Rare earth nanocrystals and infrared light can reveal small cancerous tumors and cardiovascular lesions October 21st, 2014

Nitrogen Doped Graphene Characterized by Iranian, Russian, German Scientists October 21st, 2014

Crystallizing the DNA nanotechnology dream: Scientists have designed the first large DNA crystals with precisely prescribed depths and complex 3D features, which could create revolutionary nanodevices October 20th, 2014

IRLYNX and CEA-Leti to Streamline New CMOS-based Infrared Sensing Modules Dedicated to Human-activities Characterization October 15th, 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