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:
News and information
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
Bacterial spare parts filter antibiotic residue from groundwater May 22nd, 2013
UofL scientists uncover how grapefruits provide a secret weapon in medical drug delivery May 22nd, 2013
Atomic-Scale Investigations Solve Key Puzzle of LED Efficiency: MIT and Brookhaven Lab scientists use electron microscopy imaging techniques to settle a solid-state controversy and raise new experimental possibilities May 22nd, 2013
Thin films
Moth-Inspired Nanostructures Take the Color Out of Thin Films May 17th, 2013
New magnetic graphene may revolutionise electronics May 11th, 2013
Cambrios Taps Sriram Peruvemba to Oversee Worldwide Marketing May 8th, 2013
A giant leap to commercialization of polymer solar cell May 7th, 2013
Sensors
New Nanopore Sensor Simplifies Analysis of Methylated DNA May 20th, 2013
Advancements and developments of solid-state nanopores sensors May 16th, 2013
Imec and Renesas collaborate on ultra-low power short range radios: Collaboration will develop robust wireless solutions for future electronics May 16th, 2013
Physicists discover a new kind of friction: Friction in the nano-world May 16th, 2013
Announcements
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
Bacterial spare parts filter antibiotic residue from groundwater May 22nd, 2013
UofL scientists uncover how grapefruits provide a secret weapon in medical drug delivery May 22nd, 2013
Atomic-Scale Investigations Solve Key Puzzle of LED Efficiency: MIT and Brookhaven Lab scientists use electron microscopy imaging techniques to settle a solid-state controversy and raise new experimental possibilities May 22nd, 2013
Tools
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
Atomic-Scale Investigations Solve Key Puzzle of LED Efficiency: MIT and Brookhaven Lab scientists use electron microscopy imaging techniques to settle a solid-state controversy and raise new experimental possibilities May 22nd, 2013
Xmark Media announces the 2013 Vacuum Expo & Vacuum Symposium, Ricoh Arena - Coventry 16-17 October May 21st, 2013
JPK reports on single molecule research at IISER Pune in India using AFM and CellHesion techniques May 21st, 2013