Influence of microstructure on permeability dispersion and power loss of NiZn ferrite

Abstract

Frequency dispersion of complex permeability in Mn-Zn and Ni-Zn spinel ferrites and their composite materials

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

“…The measured grain size values for bulk ferrites (0.5-1.5 μm) are lower than those reported (5-20 μm) [25][26][27].…”

“…The spectra observed contains two significant absorption bands which appear between 530-600 and 350-450 cm −1 and reveal the formation of single-phase spinel ferrites having two sublattices, tetrahedral site and octahedral site [26]. The observed first band at higher wave numbers of ∼590 cm −1 (υ 1 ) and ∼570 cm −1 (υ 1 ) attributed to the stretching vibrations of bond between cation and oxygen ions at the tetrahedral site for both sol-gel and solid-state reaction samples, respectively.…”

Magnetic properties of soft ferrites and amorphous ribbons up to radiofrequencies

“…The insofar reported calculations do not support, however, the general idea that eddy currents play an important role in ferrites, while not providing, at the same time, any definite assessment of the loss dependence on frequency and the related complex permeability properties [8,12]. The latter are sometimes described by means of empirical formulas with abundant number of fitting parameters [10,16]. Experimental limitations thus compound with lack of quantitative modelling.…”

Smart magnetodielectric nano-materials for the very high frequency applications

“…Complex permeability and permittivity spectra for samples S1, S2 and S3 over the frequency range 10 MHz-1 GHz. chiometry, microstructural homogeneity, impurity, synthesis route and density/porosity [22,23]. The complex permeability of sintered ferrite is related to two different magnetizing mechanisms: the spin rotational magnetization and the domain wall motion.…”