Abstract
Magnetic properties of α-Fe2O3 partly filled MWNT/Polyvinyl Alcohol (PVA) composites film have been studied by Raman spectroscopy, Fourier Transform InfraRed (FTIR) spectroscopy, Transmission Electron Microscopy (TEM), Vibrating Sample Magnetometer (VSM), Four Point Probe (FPP). The Composite films were prepared by simply mixing between α-Fe2O3 –filled Multiwalled Carbon Nanotube(MWNT) dispersed in Sodium Dodecyl Sulphate (SDS) with 10% PVA solution for 4 variation concentration with a total volume 5 ml. The result of Raman Spectroscopy on precursor sample showing the existence of α-Fe2O3 phase and MWNT. From FTIR spectroscopy on the film samples observed the attachment of the PVA with iron oxide and MWNT. The paramagnetic properties of the samples film were investigated by means of Vibrating Sample Magnetometer (VSM). The higher value of magnetoresistanceratiowas +40% on the sample with percolation threshold Pc = 0.51 wt%. The interaction between α-Fe2O3 filled MWNT in matrix polymer PVA made shrinkage or decreased the localization length inside the grain of composites film.
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