Soft magnetic ferrites — Development or stagnation?

Kulikowski, J.

doi:10.1016/0304-8853(84)90136-7

Cited by 135 publications

(17 citation statements)

References 6 publications

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“…Magnetic semiconductor ferrites are still studied extensively for their wide field of technological applications, especially in operating memories, high and very high-frequency circuits, transformer cores, analog devices and high quality filters (Kulikowski, 1984). Xray diffraction studies have been made for MgxZ~.3Fe2.7-,04 (Mazen, Abdel Rahiem and Sabrah, 1988) and Zn,Mgl-,Fe204 (Joshi, Deshpande, m o t and Sawant, 1987).…”

Section: Introductionmentioning

confidence: 99%

Structural studies for Zn_xMg_0.8-xNi0.2Fe₂O₄ ferrites

et al. 1996

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A series of samples of the system ZnIMgo.8-,N~.2Fe~04 (with x=0,0.2,0.4,0.6 and 0.8), was prepared using the usual ceramic technique. The samples were studied using X-ray diffraction, DTA, TG, TGA and IR spectroscopy. The lattice constant, radius of tetrahedral ion, X-ray density and measured bulk density are found to increase while porosity decreases as zinc ion content increases. Both TG and TGA spectra show two exothermic phases at the magnetic T, and Curie T, transition temperatures while DTA does not indicate any exothermic processes. The transition temperatures were found to increase as Zn ion content decreases. The four IR bands speclfyig femtes are observed whose intensities and positions are composition dependent.

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Section: Introductionmentioning

confidence: 99%

Structural studies for Zn_xMg_0.8-xNi0.2Fe₂O₄ ferrites

et al. 1996

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“…As magnetic materials, ferrites cannot be replaced by any other magnetic material because they are relatively inexpensive and stable, and have a wide range of technological applications [9,10]. The high electrical resistivity and consequently low eddy currents and dielectric losses make them very important materials.…”

Section: Introductionmentioning

confidence: 99%

Complex impedance and electric modulus studies of magnetic ceramic Ni0.27Cu0.10Zn0.63Fe2O4

2015

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Abstract:The electrical properties of Ni 0.27 Cu 0.10 Zn 0.63 Fe 2 O 4 (NCZF) prepared from auto combustion synthesis of ferrite powders have been studied by impedance and modulus spectroscopy. We studied frequency and temperature dependencies of impedance and electric modulus of NCZF in a wide frequency range (20 Hz-5 MHz) at different measuring temperatures SM T (30-225 ℃). The complex impedance spectra clearly showed both grain and grain boundary effects on the electrical properties. The observed impedance spectra indicated that the magnitude of grain boundary resistance gb R becomes more prominent compared to grain resistance b R at room temperature, and with the increase in SM T , gb R decreases faster than the intrinsic b R . The frequency response of the imaginary part of impedance showed relaxation behavior at every SM T , and the relaxation frequency variation with SM T appeared to be of Arrhenius nature and the activation energy has been estimated to be 0.37 eV. A complex modulus spectrum was used to understand the mechanism of the electrical transport process, which indicated that a non-Debye type of conductivity relaxation characterizes this material.

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“…Copper ferrite has potential applications in nanoscience and technology. Non-magnetic Zn doped copper ferrites are of interest in fundamental understanding of the properties and variety of applications such as radiofrequency circuits, transformer cores, antennas and read/write heads for high speed digital tape and in high quality filters [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%