STUDY OF STRUCTURAL AND MAGNETIC PROPERTIES OF Co1-xZnxCr0.5Fe1.5O4 FERRITE THIN FILM BY PLD TECHNIQUE

摘要

The Zinc doped cobalt chromium ferrites with the general formula Co1-xZn xCr0.5Fe1.5O4 are used to deposit the thin films on silicon Si (100) substrate using pulsed laser deposition technique keeping the substrate temperature constant at 450oC. The pressure inside the chamber was 10-4Torr. After deposition these thin films have been post annealed at 800C0 to achieve the crystallinity. The structural properties, surface analysis, magnetic and optical properties have been analyzed by X-ray Diffractrometer, Atomic Force Microscopy, Spectroscopy Ellipsometry and Vibrating Sample Magnetometer respectively. XRD analysis revealed that lattice parameters decreases from 8.796 A0 to 8.705 A0 and crystallite size increases from 19 nm to 68nm with increasing the zinc contents. AFM analysis showed that average roughness increases with enhancement of zinc which may be due to increasing grain size and thickness. The ellipsometric analysis revealed that the band gap energy increases from 1.91 eV to 3.0 eV.