Structural, electrical and magnetic characterization of Al3+ substituted Mg–Zn ferrites

Kuru, Mehmet; Dokan, Fatma Kılıç; Kuru, Tuğba Şaşmaz

doi:10.1007/s00339-022-05443-x

Cited by 6 publications

(1 citation statement)

References 69 publications

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“…small or low intensity Dielectric tangent loss (tan δ) peaks at high frequency region happen due to relaxations of dipole polarization at conducting grains. Further loss peaks of doped samples shift towards the low frequency region [1,10]. AC Conductivity (σac).…”

Section: Symposium On Advanced Materialsmentioning

confidence: 99%

Electrical Properties of Lanthanum Doped Cobalt Ferrite Nanoparticales

Kamran

Abbas

Akhtar

et al. 2022

Advances in Science and Technology

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Ferrites materials with Spinel structure have been broadly studied in recent years because of numerous technological applications. Lanthanum substituted Co-ferrites nanoparticles (CoLa0.075Fe1.925O4) were synthesized via chemical co-precipitation method. X-ray Diffraction study revealed that prepared nanoparticales are single-phased spinel ferrites. Lattice constant, crystallite size, theoretical densities were estimated from XRD data. Electrical properties have been investigated with frequency ranging from 20Hz to 3MHz at room temperature. Dielectric constant and dielectric loss factor shows decreasing trend with increasing frequency. Ac conductivity exhibit increasing behavior with increasing frequency. The contribution of grains and intergrain boundaries in conduction process was estimated from impedance study. Nyquist plot shows dominant contribution of grain boundary resistance than the grain resistance in conduction mechanism.

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Section: Symposium On Advanced Materialsmentioning

confidence: 99%

Electrical Properties of Lanthanum Doped Cobalt Ferrite Nanoparticales

Kamran

Abbas

Akhtar

et al. 2022

Advances in Science and Technology

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Effect of calcination temperature on structural, magnetic, and dielectric properties of Mg0.75Zn0.25Al0.2Fe1.8O4 ferrites

Şaşmaz Kuru

2024

J Mater Sci: Mater Electron

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Based on the desire to improve material properties, the effects of temperature have begun to be investigated. It was found that for nano-sized powder materials, such as ferrites, the structural properties like crystal structure and grain size, as well as many magnetic and electrical properties depending on them, change with the calcination temperature. Considering these changes, the effect of calcination temperature on the structural, magnetic, and electrical properties of MZA ferrites (Mg0.75Zn0.25Al0.2Fe1.8O4) prepared by co-precipitation was investigated in this study. The produced MZA ferrites were calcined at three different temperatures (600, 700, and 800 °C). The X-ray diffraction results showed that the samples exhibited a cubic spinel structure. It was found that the crystal sizes (D_sch) calculated using the Debye-Scherrer equation increased with increasing calcination temperature (22.47, 33.53, and 42.53 nm). From the Williamson–Hall (W–H) plots, crystal sizes were calculated almost same as Debye–Scherrer crystal sizes. The nano-sized particles were examined by scanning electron microscope (SEM). Elemental analysis was performed using EDX. $${\nu }_{1}$$ ν 1 and $${\nu }_{2}$$ ν 2 absorption bands and O–H and C–H vibrations were detected in the FTIR spectra. Magnetic measurements were carried out at room temperature and in the range of ± 60 kOe under the applied field. Magnetic results are explained by superparamagnetism. Dielectric measurements were performed at room temperature and a frequency range of 20 Hz to 10 MHz. The dielectric properties can be explained by Maxwell–Wagner theory. Impedance spectroscopy study revealed that the relaxation mechanism is consistent with the Cole–Cole model. In AC conductivity studies at room temperature, it was found that the sample calcined at 600 °C would be suitable for energy storage devices.

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