Influence of the doping of Ti4+ ions on electrical and magnetic properties of Mn1+xFe2−2xTixO4 ferrite

Fabrication and characterization of Ni0.3Zn0.7Fe2.0O4-BaTiO3 ceramic composites

“…α in the relation I = kV α 16) was evaluated to be α = 1.0 for all the samples and also a DC bulk resistivity to be ρ /Ω·cm = 6.3 × To examine the effect of electron hopping in the NZ ferrite, which could occur by the incorporation of a tetravalent cation such as Ti 4+ into Fe 3+ -site in the spinel structure, 17) on the electrical properties of the composites, the Ti concentration in the NZ ferrite matrix phase was measured by EDS analysis for each composite sample. The result is given in Fig.…”

Effect of Sn–Ni substitution on the structural, electrical and magnetic properties of mixed spinel ferrites

“…Several cations such as Zn 2+ , Cu 2+ , Co 2+ and Ti 4+ have been attempted by several researchers in order to improve the electrical and magnetic properties of manganese ferrites [13][14][15][16][17][18][19]. Ti 4+ substitution at iron site in manganese ferrites is known to be effective in reducing magneto crystalline anisotropy and enhancing the electrical resistivity, these properties are suitable for wide range of * Corresponding author.…”

“…Tel. : +92 300 9879344; fax: +92 61 9210068. industrial applications [18]. However, Ti 4+ substitution in MnFe 2 O 4 requires costly titanium salts for chemical synthesis and also needs higher heat treatment to obtain single phase [20].…”

Influence of V2O5 ion addition on the conductivity and grain growth of Ni–Zn–Cu ferrites

“…Substitution with Zn as a non-magnetic element by 0.2 in these compounds reduces the transition temperature [11,13], so the expected transition temperature for the sample x = 0.0 is around %588 K. The replacement of Fe with vanadium as a non-magnetic element also with x = 0.05 will reduce the transition temperature to be around %573 K. Therefore the change in the slops below these temperatures can refer to the change in the conduction mechanism as pointed out by Smit and Wijn [14]. This behavior has been observed in the conductivity versus temperature plots for many ferrites [15,16]. As V 2 O 5 concentration increases in this ferrite system (x = 0.1 and 0.15), semiconductor-to-semimetallic transition occurs at low temperature where the conductivity is temperature independent and the frequency is dependent.…”