Phase structure refinement, electric modulus spectroscopy, Urbach energy analysis, and magnetic properties of Ce3+–Ni2+-substituted Y-type barium hexaferrites

•Ferrimagnetic Ce3+–Ni2+ substituted Y-type Barium hexaferrites.•Rietveld crystal structure refinement using Fullprof software.•Maxwell–Wagner two-layer model and Koop’s phenomenological theory.•Variation in magnetic properties based on ligand-field theory. In this work, the influence of Ce3+–Ni2+ s...

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Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2022-06, Vol.280, p.115682, Article 115682
Main Authors: Alrebdi, Tahani A., Khalil Yahaya, I., Mohammed, J., Wudil, Y.S., Paray, Amin, Tchouank Tekou Carol, T, Hafeez, H.Y., Srivastava, A.K.
Format: Article
Language:English
Subjects:
Barium hexaferrite
Cerium
Chemical composition
Crystals
Electrical properties
Ferrimagnetism
Field theory
Fourier transforms
Impedance spectroscopy
Iron oxides
Magnetic properties
Nickel ferrites
Rietveld refinement
Sol-gel processes
Solid phases
Substitutes
Urbach tail
Van der Waals forces
Y-type hexaferrite
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Summary:•Ferrimagnetic Ce3+–Ni2+ substituted Y-type Barium hexaferrites.•Rietveld crystal structure refinement using Fullprof software.•Maxwell–Wagner two-layer model and Koop’s phenomenological theory.•Variation in magnetic properties based on ligand-field theory. In this work, the influence of Ce3+–Ni2+ substitution on the properties of sol-gel–synthesized Y-type hexaferrites with the following chemical composition is investigated: Ba2-xCexZn0.7Co0.7Cu0.6Fe12-yNiyO22 (x = 0.0, 0.4, and 0.6; y = 0.0, 0.5, and 0.7). X-ray diffraction analysis reveals the presence of a few NiFe2O4 and Fe3O4 secondary phases in the substituted samples (M2 and M3). The Fourier-transform infrared bands at 430, 543, and 582 cm−1 are characteristic bands of iron-oxides, which indicate the vibrations of the octahedral and tetrahedral sites in the S-block of the Y-type hexaferrite. The morphology analysis reveals agglomerated grains, which were generated by weak Van der Waals force and magnetic interaction. The optical analysis reveals the presence of an Urbach energy tail. The electrical properties were investigated based on the Maxwell–Wagner two-layer model and Koop’s phenomenological theory. Increase in the magnetization is observed by substituting Fe3+ with Ni2+ and was studied according to the ligand-field theory.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2022.115682