Effect of In3+ ions doping on the structural and magnetic properties of Mg0.2Mn0.5Ni0.3InxFe2−xO4 spinel ferrites

Cation distribution and Mössbauer spectral studies of Mg0.2Mn0.5Ni0.3InxFe2−xO4 ferrites (x=0.0, 0.05 and 0.10)

“…Such a stress hinders the growth of grains, so the grain sizes of the samples doped with In 3+ ions are smaller than that of Mg-Mn-Ni ferrite nanocrystal, Table 1. Furthermore, some In 3+ ions may reside at grain boundary when In 3+ ions are doped in Mg-Mn-Ni ferrite [6], as the ionic radii of the In 3+ ions is larger than that of Fe 3+ ions. The presence of In 3+ ions at the boundary of grain will bring pressure on the grains and hinder the growth of grains.…”

“…The Mg 0.2 Mn 0.5 Ni 0.3 In x Fe 2Àx O 4 ferrite samples (x = 0.0, 0.05 and 0.10) were prepared by citrate precursor technique [6]. X-ray diffraction studies were made by Cu Ka radiation of wavelength k = 1.5406 Å using PAN analytical X'Pert Pro X-ray diffractometer.…”

“…But expansion of tetrahedral A-site causes induced perturbation on the neighbori ng octahedral B-site with increasing indium concentr ation. This may cause the site percolation of In 3+ ions to octahedral B-site even when x < 0.10 [6]. Indium is diamagnetic and initially its ions migrate to the tetrahedral A-site [1,7].…”

Correlation between coercive field and radiation attenuation in Ni and Mg ferrite doped with Mn and Co

“…In order to boost technological headway it is needed the combination of components with proper electric and magnetic properties [2,5,6,7]. However, as to oxide ceramics such as ferrites, the composition, the synthesis parameters and the intrinsic characteristics (magnetic saturation, permeability and magnetic permittivity) are associated with their structural properties [6,8,9,10]. This has become decisive for obtaining high performance technological materials [11][12][13][14][15][16][17] .…”

“…Aiming to investigate these changes, NiMgM x Fe 2 O 4 phases were synthesized, where M represents Mn, Co or simultaneously Mn and Co dopant and x ¼0.1, and their powders were physical-chemically characterized. In this work, the studied compositions were obtained by one of most effective methods for synthesizing ferrites which is the process of citrate precursors [7,8,9,11]. In this work, we highlight the influence of thermal treatment, the chemical composition, and the hysteresis characteristics (Hc) in the absorption of electromagnetic radiation of these materials.…”