ANM
2010
3rd
International Conference on Advanced Nano Materials
12-15 September 2010 - Agadir, Morocco
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Abstract
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ANMM205 |
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GROWTH AND MAGNETIC STUDIES OF PURE FE AND FE-NI/CU MULTILAYER NANOWIRES ELECTRODEPOSITED INTO THE NANO-HOLES IN POROUS SIO2 |
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Gholamreza Nabiyouni |
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Department of Physics, University of Arak, Beheshti Avenue, Arak 38156, Iran |
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In
this work we grow nano-structures consisting of ferromagnetic and
non-magnetic metal or alloy nanowires, electrodeposited into the etched
ion tracks previously created inside SiO2/Si substrates. The
SiO2/Si substrates were first exposed by high energy Ar ions to make
them tracked and in order to dig nano-scale wells the substrates then
were etched in HF acid. This process leads to produce holes with
a few microns deep and a few nanometers width in the SiO2 side of
SiO2/Si substrates. We fabricate the metal nanostructure wires, which
are so-called because two of their characteristic dimensions are of the
order of a few nanometers or less. This is currently a very active and
exciting area of research, as so many of the techniques which make
materials engineering possible on this ultra-fine scale have only
recently been developed. The holes then filled by Ni or Ni-Cu alloy
using electrodeposition technique. Electrodeposition process takes
place in a single electrolyte containing Fe+2, Ni+2 and Cu+2 ions by
applying a proper deposition potential using a computer control
potensiostat. The samples then characterized using scanning
electron microscopy (SEM) as well as energy dispersive X-ray
spectroscopy (EDX). The magnetic properties of the sample were studied
using Vibrating Sample Magnetomerty (VSM).The results show the Fe-Ni/Cu
multilayer nanowires exhibit current perpendicular in plane- giant
magnetoresistance (CPP-GMR). The results could be of a great
interest for the sensor fabrication community as they will provide a
view on a very important direction of the developing of the wide-spread
sensor industry.
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