Effect of substrate temperature on structural and magnetic properties of c-axis oriented spinel ferrite Ni0.65Zn0.35Fe2O4 (NZFO) thin films

Abstract

Varying the substrate temperature changes structural and magnetic properties of spinel ferrite Ni 0.65 Zn 0.35 Fe 2 O 4 (NZFO) thin films. X-ray diffraction of films grown at different temperature display only (004) reflections, without any secondary peaks, showing growth orientation along the c-axis. We find an increase in crystalline quality of these thin films with the rise of substrate temperature. The surface topography of the thin films grown on various growth temperatures conditions reveal that these films are smooth with low roughness; however, the thin films grown at 800 o C exhibit lowest average and root mean square (rms) roughness among all thin films. We find iron and nickel to be more oxidized (greater Fe 3+ and Ni 3+ content) in films grown and annealed at 700 o C and 800 o C, compared to those films grown at lower temperatures. The magnetic moment is observed to increase with an increase of substrate temperature and all thin films possess high saturation magnetization and low coercive field at room temperature. Films grown at 800 o C exhibit a ferrimagnetic-paramagnetic phase transition well above room temperature. The observed large magnetizations with soft magnetic behavior in NZFO thin films above room temperature suggest potential applications in memory, spintronics, and multifunctional devices.

Properties of multicomponent (Mn-Ni-Co-Al-Si-Ti) oxide spinel hierarchically organized nanostructures deposited by magnetron sputtering in two temperatures.

“…For example, this is observed in the case of NiO films [17] and TiN films deposited by magnetron sputtering [18]. The same effect was presented by D. K. Pradkan for spinel ferrite Ni0.65Zn0.35Fe2O4 films deposited by Pulsed Laser Deposition [19] and Prabhu Rajagiri et. all.…”

Effect of Oxidant Concentration on Properties of Ferrite Films by Spin-Spray Deposition

“…Furthermore, Matsushita's research also found that incorporating FeCl 3 into the primary formulation resulted in coarser grain growth, leading to a wavy appearance on the film's surface; cross-sectional images revealed that the grains in these films grew in a columnar structure. These studies underscore the importance of precursor solution and pH value control in the fabrication process of NiZn ferrite thin films [22][23][24]. Precise control of the chemical reaction conditions can significantly enhance the microstructure and magnetic properties of the films, thus offering materials with higher performance for high-frequency electromagnetic applications.…”

Effects of Substrates on Thin-Film Growth of Nickel Zinc Ferrite by Spin-Spray Deposition

“…Furthermore, prior studies employed various substrates without extensively examining their influence on the magnetic properties of thin films. In fact, the effect of the substrate plays an important part in tuning the structural and magnetic characteristics of ferrite thin films [22][23][24].…”