R&D: Effect of Ce3+ Substitution on Sr2+, Structural and Magnetic Properties of Nanocrystalline SrFe12O19 Hexaferrites Prepared by Self-Propagation Method Using Mixed Fuels

Journal of Superconductivity and Novel Magnetism has published an article written by J. Lakshmikantha, G. Krishnamurthy, Department of Chemistry, Sahyadri Science College, Shivamogga, Karnataka, 577203, India, B. M. Nagabhushan, Department of Chemistry, M.S. Ramaiah Institute of Technology, Bengaluru, Karnataka, 560054, India, C. S. Naveen, Department of Physics, School of Engineering, Presidency University, Bengaluru, 560064, India, and E. Melagiriyappa, Research Resource Center, Visvesvaraya Technological University, Belagavi, Karnataka, 590018, India.

Abstract: “The nanocrystalline Sr_(1−x)Ce_xFe₁₂O₁₉ (x = 0.00 < x < 0.09) strontium M-type hexaferrites (SrM-HFs) were prepared by self-propagation method using mixed fuels. The structure, morphology, and composition were analyzed by X-ray diffractometer (XRD), field emission scanning electron microscopy (FE-SEM) technique, and energy dispersive X-ray analysis (EDAX), respectively. Vibrating sample magnetometer (VSM) instrument was used for the determination of magnetic properties of each prepared sample. XRD peaks reveal nanocrystalline nature with a hexagonal single phase magnetoplumbite-like crystal structure. The FESEM micrograph shows accumulation of hexaferrite nanocompact magnetic aggregation. In addition, the size of the particles reduced with the increase in of Ce³⁺ ion content. The VSM analysis confirmed that SrM-HFs are hard magnetic in nature. Moreover, it is observed that the saturation magnetization and magnetic parameters of strontium ferrites decrease with the increase of the content of Ce³⁺ ion. In addition, Ce³⁺ substituted SrFe₁₂O₁₉ are most useful for magnetic recording and memory devices.“