NDLI: Structural, Magnetic, and Dielectric Properties of Ni$_{0.5}$Zn$_{0.5}$Al$_{ x }$Fe$_{2−x }$O$

Content Provider	Springer Nature Link
Author	Babu, B. Rajesh Ramesh, K. V. R. Prasad, M. S. Purushotham, Y.
Copyright Year	2016
Abstract	This work investigates the effect of non-magnetic aluminum (Al) substitution in structural, morphological, magnetic, and dielectric properties of nanosized Ni$_{0.5}$Zn$_{0.5}$Al$_{ x }$Fe$_{2−x }$O$_{4}$ (0.0 ≤ x ≤ 0.25) synthesized through citrate-gel autocombustion route (CGAC). Structural characterizations were performed by using X-ray powder diffraction (XRD), FT-IR, and scanning electron microscope (SEM). XRD reveals the formation of single-phase cubic spinel with crystallite sizes around 62–57 nm for all Al substituted samples estimated from Williamson-Hall method. Two significant absorption bands around 600 cm$^{−1}$ and 400 cm$^{−1}$ are observed from FT-IR spectra of samples under investigation, which confirms the formation of a single-phase cubic spinel. Interionic bond lengths and bond angles confirm the solubility of Al in the spinel lattice and support the observed variation in magnetic properties. Using vibrating sample magnetometer (VSM) saturation magnetization, coercivity has been measured. A decrease in lattice parameter, saturation magnetization with increasing Al concentration was attributed to the difference in the ionic radii and weakening of exchange interactions. The decrease in initial permeability explained on the basis of variation in grain size and porosity. Dielectric constant and dielectric loss decreases with increasing Al concentration and with frequency.
Starting Page	939
Ending Page	950
Page Count	12
File Format	PDF
ISSN	15571939
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	29
Issue Number	4
e-ISSN	15571947
Language	English
Publisher	Springer US
Publisher Date	2016-01-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ni-Zn-Al ferrite Citrate-gel autocombustion Electron microscopy Grain size Permeability Dielectric constant Strongly Correlated Systems, Superconductivity Magnetism, Magnetic Materials Condensed Matter Physics Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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