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Optical, X-Ray Diffraction, and Magnetic Properties of the Cobalt-Substituted Nickel Chromium Ferrites (CrCoxNi1−xFeO4, x=0, 0.2, 0.4, 0.6, 0.8, 1.0) Synthesized Using Sol-Gel Autocombustion Method
Joint Authors
Bhukal, Santosh
Chandra, Kailash
Bansal, S.
Singh, Jagdish
Singhal, Sonal
Source
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-05-22
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Engineering Sciences and Information Technology
Chemistry
Abstract EN
Cobalt-substituted nickel chromium ferrites (CrCoxNi1−xFeO4, x=0, 0.2, 0.4, 0.6, 0.8, 1.0) have been synthesized using sol-gel autocombustion method and annealed at 400 °C, 600 °C, 800 °C, and 1000 °C.
All the ferrite samples have been characterized using UV-VIS spectrophotometery, FT-IR spectroscopy, Transmission Electron Microscopy, powder X-Ray Diffraction, and magnetic measurements.
Typical FT-IR spectra of the samples annealed at 400°C, 600°C, 800°C, and 1000°C exhibit two frequency bands in the range of ∼480 cm−1 and ∼590 cm−1 corresponding to the formation of octahedral and tetrahedral clusters of metal oxide, respectively.
TEM images reveal that crystallite size increases from ∼10 nm to ∼45 nm as the annealing temperature is increased from 400°C to 1000°C.
The unit cell parameter “a” is found to increase on increasing the cobalt concentration due to larger ionic radius of cobalt.
Also, as the cobalt concentration increases, the saturation magnetization increases from 4.32 to 19.85 emu/g.
This is due to the fact that cobalt ion replaces the less magnetic nickel ions.
However, the coercivity decreases with increase in cobalt concentration due to the decrease in anisotropy field.
The band gap has been calculated using UV-VIS spectrophotometry and has been found to decrease with the increase of particle size.
American Psychological Association (APA)
Singhal, Sonal& Bhukal, Santosh& Singh, Jagdish& Chandra, Kailash& Bansal, S.. 2011. Optical, X-Ray Diffraction, and Magnetic Properties of the Cobalt-Substituted Nickel Chromium Ferrites (CrCoxNi1−xFeO4, x=0, 0.2, 0.4, 0.6, 0.8, 1.0) Synthesized Using Sol-Gel Autocombustion Method. Journal of Nanotechnology،Vol. 2011, no. 2011, pp.1-6.
https://search.emarefa.net/detail/BIM-509040
Modern Language Association (MLA)
Singhal, Sonal…[et al.]. Optical, X-Ray Diffraction, and Magnetic Properties of the Cobalt-Substituted Nickel Chromium Ferrites (CrCoxNi1−xFeO4, x=0, 0.2, 0.4, 0.6, 0.8, 1.0) Synthesized Using Sol-Gel Autocombustion Method. Journal of Nanotechnology No. 2011 (2011), pp.1-6.
https://search.emarefa.net/detail/BIM-509040
American Medical Association (AMA)
Singhal, Sonal& Bhukal, Santosh& Singh, Jagdish& Chandra, Kailash& Bansal, S.. Optical, X-Ray Diffraction, and Magnetic Properties of the Cobalt-Substituted Nickel Chromium Ferrites (CrCoxNi1−xFeO4, x=0, 0.2, 0.4, 0.6, 0.8, 1.0) Synthesized Using Sol-Gel Autocombustion Method. Journal of Nanotechnology. 2011. Vol. 2011, no. 2011, pp.1-6.
https://search.emarefa.net/detail/BIM-509040
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-509040