Optics and Photonics Society of Iran

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Jafarpoor M, Rostami M, Majles Ara M H. Synthesis and characterization of the structural, optical and magnetic properties of Ni-Mn spinel ferrites doped with Lanthanum. ICOP & ICPET _ INPC _ ICOFS 2020; 27 (1) :103-105
URL: http://opsi.ir/article-1-2267-en.html

In this study, after synthesis of Ni-Mn spinel ferrites doped with Lanthanum by sol-gel auto- combustion method, their structural, optical and magnetic properties have been studied. XRD analysis was used to investigate the structural properties, which confirmed that the synthesized powders have a dominant phase of spinel ferrite with space group of Fd3m. The crystallite sizes were also calculated by the Scherer equation and were obtained for pure and contaminated samples at about 41.915 and 41.919 nm, respectively. FESEM analysis was also used to examine the morphology of the samples. The magnetic properties of the samples were investigated by VSM analysis and it was found that these nanoparticles are soft magnetic materials with high saturation magnetization, and therefore have applications in the field of electromagnetic protection, reading heads in the field of data storage and so on. Correspondingly, UV-VIS analysis was used to investigate the optical properties and determine the energy gap of the samples using the Tauc relation and the energy gap for the pure and doped samples was calculated as 1.715 eV and 1.802 eV, respectively.