Hydrothermal synthesis of NiFe2O4 nano-particles: structural, morphological, optical, electrical and magnetic properties

NiFe 2 O 4 nano-crystallites with an average diameter of 8.9 nm are synthesized via hydrothermal method. The single-phase spinel structure is confirmed from X-ray diffractograms. Morphology is analysed by transmission and field emission scanning electron microscopes. High specific surface area of 55...

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Bibliographic Details
Published in:Bulletin of materials science 2017-04, Vol.40 (2), p.417-425
Main Authors: BABU NAIDU, K CHANDRA, MADHURI, W
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Crystallites
Dielectric properties
Electrical conduction
Emission analysis
Energy gap
Engineering
Field emission microscopy
Grain size
Magnetic measurement
Magnetic properties
Materials Science
Morphology
Nanoparticles
Nickel ferrites
Nitrates
Optical properties
Particle size
Visible spectrum
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Summary:NiFe 2 O 4 nano-crystallites with an average diameter of 8.9 nm are synthesized via hydrothermal method. The single-phase spinel structure is confirmed from X-ray diffractograms. Morphology is analysed by transmission and field emission scanning electron microscopes. High specific surface area of 55.7 m 2 g −1 is obtained for nano-particles. The M – H loop and M – T curve behaviours are investigated by vibrating sample magnetometry. The optical band gap energy is estimated from the UV–visible spectrum. In addition, the frequency dependence of dielectric properties is investigated. Cole–Cole plots are drawn to study electrical conduction mechanism and the kind of relaxation—Debye or non-Debye type. Low a.c. conductivity and low magnetic losses are noticed at 5 MHz frequency, which are suitable for microwave device applications.
ISSN:0250-4707
0973-7669
DOI:10.1007/s12034-017-1374-4