Effect of nickel on the electrical properties of nanostructured MnZn ferrite

Venkataraju, C.; Sathishkumar, G.; Sivakumar, K.

doi:10.1016/j.jallcom.2010.03.160

Cited by 65 publications

(18 citation statements)

References 18 publications

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“…The effect of grain interfaces is more pronounced at lower frequencies, were we observe a higher value of dielectric constant (e 0 ). The space charge polarization occurring at the interfaces at lower frequencies can also contribute to dielectric constant (e 0 ) at low frequencies [8][9][10]. It is also observed from the Fig.…”

Section: Density Measurementsmentioning

confidence: 63%

Effect of bismuth on the properties of Mn ferrite nanoparticles prepared by co-precipitation method

Venkataraju

Satishkumar²,

Sivakumar

2011

J Mater Sci: Mater Electron

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Nanoparticles of MnBi x Fe 2-x O 4 (x = 0.0, 0.02, 0.04, 0.06) have been synthesized by a chemical co-precipitation method. X-ray diffraction analysis (XRD) reveals that bismuth exits in its Bi 3? and Bi 5? state. It was also observed that bismuth substitution enhances the grain growth and density. The dielectric constant (e 0 ) and the loss tangent (tan d) increases with increase in bismuth content. Resistivity (q) and maximum magnetization (M) was found to decrease with increasing bismuth content.

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Section: Density Measurementsmentioning

confidence: 63%

Effect of bismuth on the properties of Mn ferrite nanoparticles prepared by co-precipitation method

Venkataraju

Satishkumar²,

Sivakumar

2011

J Mater Sci: Mater Electron

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“…This decreases the probability of electrons reaching the grain boundary and as a result polarization decreases. This in turn decreases the dielectric constant [12]. It is composed of a high frequency semicircle and a low frequency spike in the temperature.…”

Section: Electrical Propertiesmentioning

confidence: 99%

Temperature and Frequency Dependence Electrical Properties of Zn_1-xCa_xO Nanoceramic

Das

Parashar

et al. 2016

Acta Phys. Pol. A

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This work reports the temperature and frequency dependence electrical properties of Ca doped ZnO (Zn1−xCaxO, x = 0.01) nanoceramic synthesized by solid state reaction method. The X-ray spectra show that the synthesized powder has hexagonal wurtzite structure with space group P 63mc. The average crystallite size decreases with Ca doping. The increase in oxygen positional parameter (u) indicates lattice distortion in the crystal structure. Doping with Ca caused a slight shift in the (101) plane peak towards lower diffraction angle. The formation of pores in field emission scanning electron microscopy micrograph may be due to the defect created by Ca substitution. The electrical property was investigated by impedance spectroscopy in the temperature range 300-500• C. The synthesized sample shows temperature dependence relaxation phenomena and negative temperature coefficient of resistance effects. Electrical conductivity (σac) increases with increase in temperature as well as with frequency due to the drift mobility of electrons and hole by hopping conduction. Dielectric constant was found to decrease with increase in frequency and temperature. This decreases drastically in the magnitude of approximately < 10 times than the corresponding undoped one.

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“…The electronic polarizations can orient themselves with the electric field at the lower frequency range but at higher frequency, the internal individual dipoles contributing to the dielectric constant can't move instantly. So as frequency of an applied voltage increases, the dipole response is limited and the dielectric constant diminishes [17,18,23]. Ordinary dielectric behavior shows for all fired sample and in case of 1,400°C samples a dielectric switching takes place at 33.5 kHz.…”

Section: Resultsmentioning

confidence: 89%

Dielectric switching above a critical frequency occured in iron mullite composites used as an electronic substrate

Paul

Halder

Roy

et al. 2014

J Mater Sci: Mater Electron

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Highly crystallized mullite is synthesized via sol-gel technique in presence of iron of different concentrations at different temperature. FTIR spectroscopy, XRD and FESEM characterization showed prominent mullite phase which is found to depend on the concentrations of Fe 2? ions. The phase evolution and electrical properties like dielectric constant, tangent loss, a.c. conductivity and resistivity of the composites with increasing concentration of the doped metal at different temperature have been studied. The results showed a decrease in mullite phase up to 1.2 (M) which is mainly responsible for the increasing dielectric behavior with respect to undoped mullite. The hematite phase continued to increase with increasing doping concentration. The dielectric constant decreased with frequency for all the samples attaining constancy at higher frequency, which is normal behavior for dielectric ceramics. A.c. conductivity increased with frequency following Jonscher's power law and was found to depend on the amount of glassy phase and concentration of mobile ions present in the composites. The composite showed a minimum dielectric constant of 33.69 at 1.2 (M) concentration of iron at 2 MHz. Thus due to their good dielectric response the composite may widely be used use as electronic substrates like packaging materials for integrated high speed circuits, multilayer capacitors, high voltage insulators etc.

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Effect of nickel on the electrical properties of nanostructured MnZn ferrite

Cited by 65 publications

References 18 publications

Effect of bismuth on the properties of Mn ferrite nanoparticles prepared by co-precipitation method

Effect of bismuth on the properties of Mn ferrite nanoparticles prepared by co-precipitation method

Temperature and Frequency Dependence Electrical Properties of Zn_1-xCa_xO Nanoceramic

Dielectric switching above a critical frequency occured in iron mullite composites used as an electronic substrate

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Effect of nickel on the electrical properties of nanostructured MnZn ferrite

Cited by 65 publications

References 18 publications

Effect of bismuth on the properties of Mn ferrite nanoparticles prepared by co-precipitation method

Effect of bismuth on the properties of Mn ferrite nanoparticles prepared by co-precipitation method

Temperature and Frequency Dependence Electrical Properties of Zn1-xCaxO Nanoceramic

Dielectric switching above a critical frequency occured in iron mullite composites used as an electronic substrate

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Temperature and Frequency Dependence Electrical Properties of Zn_1-xCa_xO Nanoceramic