Effect of Temperature on Structural and Magnetic Properties of Laser Ablated Iron Oxide Deposited on Si(100)

Abstract

We fabricate Fe3O4 thin films on Si(100) substrates at different temperatures using pulsed laser deposition, and study the effect of annealing and deposition temperature on the structural and magnetic properties of Fe3O4 thin films. Subsequently, the films are characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometery (VSM). The XRD results of these films confirm the presence of the Fe3O4 phase and show room-temperature ferromagnetism, as observed with VSM. We demonstrate the optimized deposition and annealing conditions for an enhanced magnetization of 854 emu/cm 3 that is very high when compared to the bulk sample.

Fabrication of IBAD-MgO and PLD-CeO 2 Layers for YBCO Coated Conductors

“…Therefore, smaller stresses are expected in thicker CeO 2 films which, dominated by the strain energy density minimization mechanism, have an energetic advantage for further growth of the (001) oriented grains. [19,20] Thus the CeO 2 layer has the thickness effect and ∆𝜑 decreases with the increasing thickness of the CeO 2 layer. The 𝜃-2𝜃 XRD pattern of the 500-nm-thick CeO 2 layer grown directly on the IBAD-MgO thin film under the optimum growth condition is shown in Fig.…”