Nanotechnology Now

Our NanoNews Digest Sponsors







Heifer International

Wikipedia Affiliate Button


Home > Press > Nano-Scientists Produce Field Sensors for Large Magnetic Resistances

Abstract:
Iranian researchers managed to produce a new kind of nano-layers which are suitable for synthesis of magnetic field sensors to be used in large magnetic resistances.

Nano-Scientists Produce Field Sensors for Large Magnetic Resistances

Iran | Posted on January 31st, 2010

The researchers could detect magnetic fields with magnitudes of less than 6 milliteslas (mT) by creating nanostructures of metals like platinum and copper on Si/SiO2/CuPt bases. Such a work is evaluated as a significant step forward in the production of magnetic field sensors with large magnetic resistances.

"In this work, a very thin film of silicon dioxide was deposited upon pure silicon, which was initially cleaned by a standard plasma cleaning process, by applying e-beam evaporation technique together with UV lithography," Seyedeh Maryam Banihashemian, a member of the research team, explained to the Iran Nanotechnology Initiative Council (INIC).

The effort led to the deposition of a 5 nanometers thick layer upon the silicon bed. In addition, by controlling layer deposition rates and pressure, the scientists managed to obtain layers of copper-platinum upon silicon-silicon dioxide bases with thicknesses less than 8 nanometers.

Then, the samples underwent wire annealing and their current-voltage curves in presence of a variable magnetic field were studied.

The obtained curves indicated that the sensors were capable of detecting magnetic filed with magnitudes of even less than 6 milliteslas. Finally nano layers were characterized by AFM, SEM, RBS tests.

"It was observed that nanometric structure of Cu-Pt, when its size is decreased, could detect magnetic fields whose magnitudes differ form that of the earth in terms of several milliteslas," Banihashemian added.

"Also, by applying magnetic fields, they exhibit unique characteristics like large magnetoresistances. These nanostructures can be used in magnetic field sensors, magnetic memories and biosensors." she added.

####

For more information, please click here

Copyright © FARS

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

Nano-needles for cells May 25th, 2013

How do cold ions slide May 24th, 2013

Gold nanocrystal vibration captured on billion-frames-per-second film May 23rd, 2013

Glowing Plant Releases Maker Kit, Enabling Anyone to Make a Glowing Plant at Home: Glowing Plant seeks funds via crowdfunding and raises almost $400,000 May 23rd, 2013

Thin films

IDTechEx launches online Market Intelligence Portal May 23rd, 2013

Weird science: Crystals melt when they're cooled May 22nd, 2013

Moth-Inspired Nanostructures Take the Color Out of Thin Films May 17th, 2013

New magnetic graphene may revolutionise electronics May 11th, 2013

Sensors

IDTechEx launches online Market Intelligence Portal May 23rd, 2013

Innovation could bring flexible solar cells, transistors, displays May 22nd, 2013

New Nanopore Sensor Simplifies Analysis of Methylated DNA May 20th, 2013

Advancements and developments of solid-state nanopores sensors May 16th, 2013

Announcements

Nano-needles for cells May 25th, 2013

How do cold ions slide May 24th, 2013

Gold nanocrystal vibration captured on billion-frames-per-second film May 23rd, 2013

Glowing Plant Releases Maker Kit, Enabling Anyone to Make a Glowing Plant at Home: Glowing Plant seeks funds via crowdfunding and raises almost $400,000 May 23rd, 2013

Tools

Heinrich Rohrer dies at 79; a father of nanotechnology: With IBM colleague Gerd Binnig, Rohrer invented the scanning tunneling microscope, which can show individual atoms on a surface and move them around May 23rd, 2013

Gold nanocrystal vibration captured on billion-frames-per-second film May 23rd, 2013

Researchers Stitch Defects into the World’s Thinnest Semiconductor May 22nd, 2013

Whirlpools on the Nanoscale Could Multiply Magnetic Memory: At the Advanced Light Source, Berkeley Lab scientists join an international team to control spin orientation in magnetic nanodisks May 22nd, 2013

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








abbigliamento uomo
Computer Accessories
© Copyright 1999-2013 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE