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DC Electrical Resistivity and Magnetic Property of Single-Phase α-Fe2O3 Nanopowder Synthesized by a Simple Chemical Method

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Nanocrystalline pure α-Fe2O3 powder, with an average particle size of 35 nm, has been synthesized by using an aqueous solution-based synthetic route. DC electrical resistivity of the synthesized material was measured with respect to temperature by the two-probe method from 28° to 225°C. Room temperature resistivity of the nanopowder was ∼108Ω·cm. Magnetic hysteresis measurement revealed that the synthesized α-Fe2O3 nanopowder exhibited ferromagnetic behavior at room temperature. The hysteretic features are high saturation magnetization of 5.1 emu/g, high remanence of 2.2 emu/g, and coercivity of 200.5 Oe.
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Document Type: Research Article

Affiliations: 1: Chemistry Group, Birla Institute of Technology and Science—Pilani, Goa Campus, Zuarinagar 403726, India 2: Defence Lab, Rajasthan, Jodhpur 342011, India 3: Directorate of ER&IPR, DRDO, DRDO Bhawan, New Delhi 110105, India

Publication date: October 1, 2009

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