Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Ultra-Sensitive Graphene Device For Spintronics

Abstract:
A European team of researchers has developed a graphene-based device capable of detecting tiny magnetic fields with a record sensitivity down to the stray field of few magnetic molecules. The researchers have used graphene as a kind spider's web to chemically trap the molecules and detect their magnetization at the same time. This breakthrough in spintronics opens the ways to applications for ultra-high density storage memories and for molecular sensors.

Ultra-Sensitive Graphene Device For Spintronics

Italy | Posted on June 28th, 2011

The study is published this month in the journal Nano Letters. The work has been performed by scientists from the S3 Center of Istituto Nanoscienze-Cnr, the Insitut Néel - CNRS, and the Karlsruhe Institute of Technology.

Magnetic molecules, nano-magnets only few billionth of meter small, are considered very promising for spintronics (electronics exploiting also the spin of the electron), since they can store a bit of information in a very small volume. In order to develop a new generation of magnetic memories it is crucial to be able to "read" tiny units that will soon reach the molecular size.

The new ultra-sensitive device realized enables the magnetic reading at the molecular scale. "It is the first time that such tiny objects are detected", says Andrea Candini, researcher at the Istituto Nanoscienze-Cnr, "just to make clear, the previous record of sensitivity has been beaten by a factor of 100".

To realize the device, the team deposited magnetic molecules on a sheet of graphene, the one atom-thick layer of Carbon famous for its amazing properties. Graphene works as a sort of spider's web able to chemically trap the molecules, to capture their magnetic flux and generate a corresponding electrical signal. This result is the outcome of a 3-year long research.. "Firstly, we synthesized molecules suitable to graft the graphene honeycomb lattice, then we tailored the graphene sheet realizing a device of about 10 nanometers in size; finally, we performed electrical measurements at very low temperatures, in order to limit the noise ".

According to the team of researchers, this result "shows that it is possible to use graphene coupled to magnetic molecules to store information, as.the new device works similarly to the spin valve present in a reading head of today's hard disks, but it is much smaller" says Andrea Candini, "We also foresee applications to detect bio-molecules marked with a single magnetic molecule, such as ultra-sensitive sensors to be integrated in a lab-on-a-chip. " Both of these objectives are in line with the goals of large-scale initiatives such as the Flagship Pilot Actions recently launched by the European Commission on related themes.

Full bibliographic information

Graphene Spintronic Devices with Molecular Nanomagnets
Andrea Candini, Svetlana Klyatskaya, Mario Ruben, Wolfgang Wernsdorfer, and Marco Affronte
DOI: 10.1021/nl2006142 http://pubs.acs.org/doi/abs/10.1021/nl2006142

####

About CNR-Consiglio Nazionale delle Ricerche
S3 is a national research center devoted to nanoscience based on a multidisciplinary approach and close interaction between experimental and theoretical activities. It is part of the Istituto Nanoscienze of the Italian Research Council (Cnr). S3 research aims at investigating and designing matter and functions at the nanoscale, as well as understanding and controlling their impact on the properties of macroscopic systems. S3 is located within the scientific campus of the University of Modena and Reggio Emilia and is based on a very close collaboration with several Departments of the University. S3 is a lively and international environment, that attracts excellent young researchers and students, and offers to them facilities designed to meet the laboratory and research needs.

For more information, please click here

Contacts:
Marco Ferrazzoli
00390649933383
mobile 0039 347 0778836

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 News Press

News and information

In IEDM 2016 Keynote, Leti CEO Says ‘Hyperconnectivity’, Human-focused Research and the IOT Promise Profound, Positive Changes December 7th, 2016

Leti IEDM 2016 Paper Clarifies Correlation between Endurance, Window Margin and Retention in RRAM for First Time: Paper Presented at IEDM 2016 Offers Ways to Reconcile High-cycling Requirements and Instability at High Temperatures in Resistive RAM December 6th, 2016

Tokyo Institute of Technology research: 3D solutions to energy savings in silicon power transistors December 6th, 2016

Physicists decipher electronic properties of materials in work that may change transistors December 6th, 2016

Construction of practical quantum computers radically simplified: Scientists invent ground-breaking new method that puts quantum computers within reach December 5th, 2016

Graphene/ Graphite

Physicists decipher electronic properties of materials in work that may change transistors December 6th, 2016

Bumpy surfaces, graphene beat the heat in devices: Rice University theory shows way to enhance heat sinks in future microelectronics November 29th, 2016

Spintronics

Making spintronic neurons sing in unison November 18th, 2016

Scientists find technique to improve carbon superlattices for quantum electronic devices: In a paradigm shift from conventional electronic devices, exploiting the quantum properties of superlattices holds the promise of developing new technologies October 20th, 2016

A new spin on superconductivity: Harvard physicists pass spin information through a superconductor October 16th, 2016

NREL discovery creates future opportunity in quantum computing: Research into perovskites looks beyond material's usage for efficient solar cells September 9th, 2016

Memory Technology

New technology of ultrahigh density optical storage researched at Kazan University: The ever-growing demand for storage devices stimulates scientists to find new ways of improving the performance of existing technologies November 30th, 2016

A Tiny Machine: UCSB electrical and computer engineers design an infinitesimal computing device October 28th, 2016

How nanoscience will improve our health and lives in the coming years: Targeted medicine deliveries and increased energy efficiency are just two of many ways October 26th, 2016

Making the switch, this time with an insulator: Colorado State University physicists, joining the fundamental pursuit of using electron spins to store and manipulate information, have demonstrated a new approach to doing so, which could prove useful in the application of low-powe September 2nd, 2016

Sensors

Shape matters when light meets atom: Mapping the interaction of a single atom with a single photon may inform design of quantum devices December 4th, 2016

Deep insights from surface reactions: Researchers use Stampede supercomputer to study new chemical sensing methods, desalination and bacterial energy production December 2nd, 2016

Tip-assisted chemistry enables chemical reactions at femtoliter scale November 16th, 2016

'Back to the Future' inspires solar nanotech-powered clothing November 15th, 2016

Announcements

In IEDM 2016 Keynote, Leti CEO Says ‘Hyperconnectivity’, Human-focused Research and the IOT Promise Profound, Positive Changes December 7th, 2016

Leti IEDM 2016 Paper Clarifies Correlation between Endurance, Window Margin and Retention in RRAM for First Time: Paper Presented at IEDM 2016 Offers Ways to Reconcile High-cycling Requirements and Instability at High Temperatures in Resistive RAM December 6th, 2016

Tokyo Institute of Technology research: 3D solutions to energy savings in silicon power transistors December 6th, 2016

Physicists decipher electronic properties of materials in work that may change transistors December 6th, 2016

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