Cu2+ and Al3+ co-substituted cobalt ferrite: structural analysis, morphology and magnetic properties

Cu–Al substituted Co ferrite nanopowders, Co 1− x Cu x Fe 2− x Al x O 4 (0.0 ≤ x ≤ 0.8) were synthesized by the co-precipitation method. The effect of Cu–Al substitution on the structural and magnetic properties have been investigated. X-ray diffraction (XRD) spectroscopy, Fourier transform infrared...

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Bibliographic Details
Published in:Bulletin of materials science 2016-08, Vol.39 (4), p.1029-1037
Main Authors: DABAGH, SHADAB, ATI, ALI A, GHOSHAL, S K, ZARE, SAMAD, ROSNAN, R M, JBARA, AHMED S, OTHAMAN, ZULKAFLI
Format: Article
Language:English
Subjects:
Alpha iron
Aluminum
Chemistry and Materials Science
Cobalt
Cobalt ferrites
Coercivity
Crystallites
Dilution
Engineering
Field emission microscopy
Field emission spectroscopy
Fourier transforms
Grain size
Infrared absorption
Infrared imagery
Infrared spectra
Infrared spectroscopy
Magnetic moments
Magnetic properties
Magnetic saturation
Materials Science
Methods
Morphology
Nanoparticles
Particle size
Structural analysis
Substitutes
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Summary:Cu–Al substituted Co ferrite nanopowders, Co 1− x Cu x Fe 2− x Al x O 4 (0.0 ≤ x ≤ 0.8) were synthesized by the co-precipitation method. The effect of Cu–Al substitution on the structural and magnetic properties have been investigated. X-ray diffraction (XRD) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM) and vibrating sample magnetometer (VSM) are used for studying the effect of variation in the Cu–Al substitution and its impact on particle size, magnetic properties such as M s and H c . Cu–Al substitution occurs and produce a secondary phase, α-Fe 2 O 3 . The crystallite size of the powder calcined at 800 ∘ C was in the range of 19–26 nm. The lattice parameter decreases with increasing Cu–Al content. The nanostructural features were examined by FESEM images. Infrared absorption (IR) spectra shows two vibrational bands; at around 600 ( v 1 ) and 400 cm −1 ( v 2 ). They are attributed to the tetrahedral and octahedral group complexes of the spinel lattice, respectively. It was found that the physical and magnetic properties have changed with Cu–Al contents. The saturation magnetization decreases with the increase in Cu–Al substitution. The reduction of coercive force, saturation magnetization and magnetic moments are may be due to dilution of the magnetic interaction.
ISSN:0250-4707
0973-7669
DOI:10.1007/s12034-016-1233-8