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

Deca Partners with ADTEC Engineering to Enhance Adaptive Patterning™ for 2µm Chiplet Scaling October 20th, 2020

Graphenea awarded “Best Graphene Firm” prize October 20th, 2020

Veeco Announces Aledia Order of 300mm MOCVD Equipment for microLED Displays: Propel™ Platform First 300mm System with EFEM Designed for Advanced Display Applications October 20th, 2020

Revealing the reason behind jet formation at the tip of laser optical fiber October 16th, 2020

Multi-state data storage leaving binary behind: Stepping 'beyond binary' to store data in more than just 0s and 1s October 16th, 2020

Graphene/ Graphite

Graphenea awarded “Best Graphene Firm” prize October 20th, 2020

Spintronics

A four-state magnetic tunnel junction for novel spintronics applications: A novel magnetic tunnel junction which has four resistance states, instead of two states in existing magnetic tunnel junctions, may pave the way to novel spintronics devices, including multi-level magnetic August 21st, 2020

Spintronics: Faster data processing through ultrashort electric pulses July 3rd, 2020

A path to new nanofluidic devices applying spintronics technology: Substantial increase in the energy conversion efficiency of hydrodynamic power generation via spin currents July 3rd, 2020

Extensive review of spin-gapless semiconductors: Next-generation spintronics candidates: spin-gapless semiconductors (SGSs) bridge the zero-gap materials and half-metals June 26th, 2020

Memory Technology

Multi-state data storage leaving binary behind: Stepping 'beyond binary' to store data in more than just 0s and 1s October 16th, 2020

Manipulating non-magnetic atoms in a chromium halide enables tuning of magnetic properties: New approach creates synthetic layered magnets with unprecedented level of control over their magnetic properties July 24th, 2020

Photochromic bismuth complexes show great promise for optical memory elements July 24th, 2020

Graphene-Adsorbate van der Waals bonding memory inspires 'smart' graphene sensors July 17th, 2020

Sensors

Octopus-inspired sucker transfers thin, delicate tissue grafts and biosensors October 16th, 2020

The most sensitive and fastest graphene microwave bolometer September 30th, 2020

An improved wearable, stretchable gas sensor using nanocomposites August 28th, 2020

Nano-diamond self-charging batteries could disrupt energy as we know it August 25th, 2020

Announcements

Deca Partners with ADTEC Engineering to Enhance Adaptive Patterning™ for 2µm Chiplet Scaling October 20th, 2020

Graphenea awarded “Best Graphene Firm” prize October 20th, 2020

Veeco Announces Aledia Order of 300mm MOCVD Equipment for microLED Displays: Propel™ Platform First 300mm System with EFEM Designed for Advanced Display Applications October 20th, 2020

GLOBALFOUNDRIES Accelerating Innovation in IoT and Wearables with Adaptive Body Bias Feature on 22FDX Platform October 16th, 2020

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