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May 20-21, 2019 | Vienna, Austria
Biomaterials and Nanomaterials &
Materials Physics and Materials Science
2nd International Conference on
Journal of Materials Science and Nanotechnology | Volume 3
Substrate effect on structural and magnetoresistance properties of amorphous
carbon thin films
Awais Siddique Saleemi, Muhammad Saeed and Shern long Lee
Shenzhen University, China
The preparation and characterization of amorphous
carbon (a-Carbon) thin films continue to be an active
topic in contemporary surface materials science. Here, we
explore the substrate effect of such thin films fabricated on
glass and SiO2 substrates by pulsed laser deposition (PLD)
technique through controlling experimental parameters
including deposition time/temperature and laser energy/
frequency. The structural and magnetoresistance (MR)
properties of the as-prepared thin films were studied by
meansofHigh-ResolutionTransmissionElectronMicroscopy
(HR-TEM), Raman, X-ray Diffraction (XRD) and X-ray Photo
Spectrometry (XPS). The D-band and G-band intensity (ID/
IG) ratio was 4.0 and 4.7, whereas the percentage of the
C(sp2) atomic ratio was 70 % and 74 %, for the sample thin
films prepared on glass and SiO2 substrates, respectively.
MR properties were investigated under a magnetic field
ranging from -9T to 9T in the temperature range of 2 K
to 40 K. A positive MR value of 15% was observed at a
low temperature of 2K for the thin films grown on SiO2
substrate at a growth temperature of 400 with the laser
frequency of 300 mJ/pulse. The structural vicissitudes can
tune the magnetoresistance properties of such a-Carbon
systems. The results designate that such properties are
more auspicious for the magnetic sensors and carbon-
based spintronics.
Speaker Biography
Awais Siddique Saleemi has completed his PhD at the age of 30 years
from Tsinghua University, Beijing, China. He is working as a researcher
at Institute for Advanced Studies, Shenzhen University, China. He has
over 20 publications that have been cited over 70 times and is working
on “Structural and magneto transport properties of amorphous carbon
thin films synthesized by Chemical Vapor Deposition and Pulsed Laser
Deposition.
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