DC Electrical Resistivity and Magnetic Property of Single‐Phase α‐Fe ₂ O ₃ Nanopowder Synthesized by a Simple Chemical Method

Abstract

Nanocrystalline pure α‐Fe 2 O 3 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 ∼10 8 Ω·cm. Magnetic hysteresis measurement revealed that the synthesized α‐Fe 2 O 3 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.