THE TRANSMITTANCE TEMPERATURE DEPENDENCE AND SPIN GLASS-LIKE BEHAVIOR IN THE NANOCOMPOSITE Fe – In2O3 THIN FILMS

Abstract

The ferromagnetic Fe-In2O3 nanocomposite thin film has been synthesized by the thermite Fe2O3 + In → Fe-In2O3 reaction. The transmittance (400 – 1100 nm) was measured at temperatures from 320 to 5 K. It was found that the transmittance increases when temperature decreases. For wavelength 600, 700, 800, 900 and 1000 nm maximum change of transmittance was ~ 3.2, 4.2, 4.8, 5.1 and 5.4 %, respectively. From transmittance spectra, spin glass-like behavior was observed near ~ 36 K and confirmed by magnetization measurements. The Verwey transition was identified at ~ 127 K by magnetization measurements. We have shown direct relationship between transmittance and magnetization of nanocomposite Fe – In2O3 thin film near ~ 36 K and give proposed possible mechanism this phenomena.