The effect of Al-substitution on structure and electrical properties of Mn-Ni-Zn ferrites
Source abstract
Abstract
X-ray diffraction, Infra-red spectroscopy and scanning electron microscopy have been used to investigate the Mn0.5Ni0.1Zn0.4Al x Fe2 − xO4 system (0 ≤ x ≤ 0.15 in steps of 0.025). The analysis of IR spectra indicates the distribution of Al-ions between both A and B-sites. The electrical resistivity and thermoelectric power as a function of temperature and Al-content have been investigated. It is observed that the resistivity increases with increasing the Al-content. It is also found that the temperature variation of resistivity exhibits two breaks, each break is associated with a change in the activation energy. Measurement of the thermoelectric power reveals n-type conduction for all samples. The activation energies of all samples in the paramagnetic region are found to be greater than those in the ferrimagnetic region. The results are explained on the basis of the formation of spin polarons in the paramagnetic region.
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Research context
OpenAlex topics: Magnetic Properties and Synthesis of Ferrites · Electrical and Thermal Properties of Materials · Magnetic Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (41)
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