Initial permeability of Zn–Ni–Co ferrite

Thermal and Frequency Variation of Permeability for Samarium–Dysprosium–Magnesium Ferrite

“…Initial (μ i ), real (μ′), and imaginary (μ″) part of permeability with temperature and frequency variation has been calculated from measured values of inductance and Q factor by using the relation described elsewhere . Figures – shows thermal variation of permeability and loss factor (L.F.) of Mg–Sm–Dy ferrites at 1 KHz.…”

“…The magnesium nitrate (Mg[NO 3 ] 2 ), ferrous nitrate (Fe[NO 3 ] 2 ), samarium nitrate (Sm[NO 3 ] 2 ), and dysprosium nitrate (Dy[NO 3 ] 2 ) were weighed in required proportion and dissolved in double distilled water. The soultion was heated until ignition process of the material is completed . The resulting powder was decomposed in air at 600 °C and finally sintered at 1000 °C for 1 h. The torroidal shaped samples were prepared by using dye with the help of hydrolic press.…”

Effect of Nonmagnetic Zn2+ Cations on Initial Permeability of Microwave‐Treated NiMg Ferrites

“…Figure (a) depicts the initial permeability (μ i ) versus temperature spectra of toroid shaped specimen sintered at 1000°C/30 min (at 3 MHz). The μ i is calculated from a standard relation where N is the number of copper coil turns on the toroid (30 in this case), h is thickness of toroid (in inches), D o , D i are outer and inner diameters and L s is series inductance in μH. The permeability is increasing with rising temperature and further decreases sharply at the Curie‐transition temperature ( T c ).…”

Comparison Study of Structural and Magnetic Properties of Magnesium-Substituted Nickel–Zinc Ferrites Synthesized by Solid-State and Sol–Gel Routes

“…Manganese doping in the Ni-Zn ferrite increases the saturation magnetization and permeability for smaller concentration [5,6]. The presence of cobalt also increases the permeability and low loss factor at high frequency [7]. Similar doping of copper and magnesium substitution of Ni-Zn ferrite also show significant results in dielectric and magnetic property changes [8][9][10]13].…”

“…Ferrites synthesized by different methods having the same size can show different cation distributions and hence different magnetic and electrical properties. In recent days, nanophase ferrites are synthesized by several methods such as sol-gel [11], microemulsion [14], chemical combustion route [7], microwave hydrothermal [15], precursor [16], and ball milling methods [17]. Among all the methods, the solgel method is the commonly used method due to feasibility and good control over particle size and homogeneity [18].…”