Preparation and Characterizations of a-Fe sub(2) O sub(3) Nanorods and their Properties

a-Fe sub(2) O sub(3) nanorods over large areas were successfully synthesized by hydrothermal method, using FeCl sub(3) as iron source and PVP as surfactant. The as-synthesized a-Fe sub(2) O sub(3) nanorods were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and magnetic measurement system (SQUID-VSM) . The results show that the nanorods prepared by hydrothermal method with the diameter of about 70 nm and the length of about 300 nm. The magnetic properties of the synthesized nanorods were studied, and the remnant magnetization and coercivity of the alpha -Fe sub(2) O sub(3) nanorods at 300K are found to be 0.07emu/g and 2300Oe, respectively. The a-Fe sub(2) O sub(3) nanorods reported here may have opportunities for both fundamental research and technological applications.