Impacts of Ni–Co substitution on the structural, magnetic and dielectric properties of magnesium nano-ferrites fabricated by micro-emulsion method

Nanocrystalline Zn1− Co0.5Ni0.5 Fe2O4 ferrites: Fabrication via co-precipitation route with enhanced magnetic and electrical properties

“…The results obtained from cell software and above relation were same and are given in table 1.The lattice parameter decreased with the increase in Ni and Co concentration that is justified by the substitution of relatively larger ionic radius (0.82Å) Zn 2+ ions with smaller ionic radius Co 2+ (0.74 Å) [6,8,16,17] and Ni 2+ (0.69 Å) [16,18,19]. As the ionic radii of Co 2+ and Ni 2+ is smaller as compared with that of Zn 2+ therefore the substitution of Co 2+ and Ni 2+ in place of Zn 2+ attributed to the decrease in lattice parameter [15,[20][21][22][23][24].The X-ray density for all compositions is calculated using the following relation [25,26] (table 1).…”

“…The position of bands in FTIR confirmed the formation of ferrite structure i.e. spinel structure [10,19,31,32]. …”

Structural and magnetic behavior evaluation of Mg–Tb ferrite/polypyrrole nanocomposites

“…This broadening of the peaks is attributed to the nano regime crystallite size [16]. The crystallite size for all samples of ferrite/polymer composites was determined by Scherrer's formula [17]. The crystallite size and other physical parameters are listed in Table 2.…”

Structural and magnetic properties of Gd 3+ ion substituted magnesium ferrite nanopowders

“…The origin of magnetic properties of magnesium ferrite is related to the variety of transition metal cations, which can be incorporated into the spinel Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/jmmm lattice of the parent magnetic structure. The influence of metal ion substitution such as Dy [6], Sm [2], Co [7], Ni-Co [8], Li [9], Co-Cr [10], Cd [11], Cu [12], Pr [13], Tb [14], Cr [15] and Ca [16] on various structural, magnetic, electrical and dielectric properties of MgFe 2 O 4 have been reported in the literature. Hence, the structural and magnetic properties depend on the nature of substituting ions, their charge and their distribution among tetrahedral and octahedral sites.…”