Investigations on electrical and magnetic properties of Fe2O3 nanoparticles dispersed in polymer film with terbium ion

Abstract

Spherical Fe2O3 nanoparticles (NPs) with average particle size 30–70 nm have been prepared by laser ablation method in distilled water by applying 1064 nm laser line from Nd:YAG laser and were used for the fabrication of PVA films with and without Tb ion. The frequency and temperature dependent electrical conductivity of PVA polymer film have been measured in presence of Tb ions with Fe2O3 NPs for frequency range between 20 Hz to 1 MHz and temperature range 308–348 K. It has been found that electrical conductivity of the films is enhanced in presence of Fe2O3 NPs and Tb ion. Magnetization (M–H) loop revealed PVA as diamagnetic with very small magnetic moment −0.0015 emu/g converted to ferromagnetic in presence of Fe2O3 nanoparticles and paramagnetic in presence of Tb ion with saturation magnetization of 0.004 emu/g and 0.07 emu/g respectively. It maintains its paramagnetic character in presence of both Fe2O3 NPs and Tb ions with saturation magnetization 0.03 emu/g. © 2015 American Scientific Publishers. All rights reserved.