Influence of Pulse Laser Energy on Structural and Magnetic Properties of CoFe₂O₄ and CoLa_0.01Fe_1.99O₄ Thin Films

Abstract

Cobalt ferrite and CoLa0.01Fe1.99O4 thin film were prepared using the pulsed laser deposition method with varying pulse laser energy. X-ray diffraction analysis was used to investigate the structure of ferrite thin films. The study was expanded to include morphology and magnetic properties. The prepared films showed a strong peak at (311), which belongs to the cubic spinel cobalt ferrite phase with the presence of some peaks belonging to α-Fe2O3 as hematite phase that depressed when doping with La ion, and the crystallization improvement significantly after intensity increases by increasing the pulsed laser energy from 500 to 650 mJ. The lattice constant of Cobalt ferrite thin films increased with an increase in the laser pulse energy while the crystallite size deduced from the Williamson Hall method showed decreases with the increases of pulse laser energy. The saturation, remnant magnetization, and coercivity of prepared films were studied according to increasing pule laser energy and Lanthanum doping.

Structural, Optical, and Morphological Study of Manganese Substituted Cobalt Ferrite and Its Effect on the Magnetic and Dielectric Properties of PVA Composites

“…1b shows the shift of the peak (311) towards the lower angles of 2θ, which indicates the change in the lattice constant with an increase in the Mn to Co ratio. The crystallite size based on the Williamson Hall (W-H) plot [17][18][19] of the prepared ferrite is 44 nm for Co ferrite and 14.6, 23.4, and 20.7 nm for x equal to 0.1, 0.2, and 0.3 respectively as shown in Fig. 2.…”