Optical properties of tableted samples containing iron oxides in THz region of spectrum

Magnetic nanoparticles are used as contrast agents in terahertz spectroscopy in vivo. In this work the terahertz spectra of refractive index and absorption index of pressed tableted samples based on iron oxide coated by silica are studied. The possibility of identifying the crystalline phase of iron oxide for both types of nanoparticles is shown.