Optical Investigation in Visible Region of IOUP below Single Domain

Abstract

Iron Oxide Ultrafine Particles (IOUP), having Magnetite phase, 18nm size, a high saturation magnetization, below the single domain magnetic behavior, were synthesized successfully by the chemical route co-precipitation. Optical characterization in visible range was carried out to analyze its interaction with nearly superparamagnetic IOUP and study the nature of below single domain particles. Optical energy band gap was found to be at 2.4eV without exciton-phonon interaction. Systematic investigation confirmed the IOUP's behavioral significance in the visible region.