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Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
Magnetic Nanoparticles: Synthesis, Characterization and Magnetic Properties of Cobalt Aluminum Ferrite
Magnetic Nanoparticles: Synthesis, Characterization and Magnetic Properties of Cobalt Aluminum Ferrite
Subject
:
physics
Document Language
:
English
Abstract
:
Nanoparticles of the ferrite system CoFe2-xAlxO4 (x = 0.0, 0.3, 0.7 and 1.0) were synthesized through the co-precipitation technique. Thermal decomposition process and formation of a single crystalline phase were followed using thermal differential analysis technique (DTA). X-ray powder diffraction patterns of the samples confirmed the formation of a nano-size single spinel phase. The average crystallite size was found to be in the range 20-63 nm for all samples. This was further confirmed by TEM of one of the samples, with concentration x = 1.0 which was found statistically to be 27 nm. This agrees well with the value of 24 nm deduced by means of X-ray diffraction method for the same sample. A considerable decrease in the intensity of the octahedral bands is observed as the aluminum concentration increases, and even vanishes completely at x = 1.0 indicating the migration of cations between the octahedral and tetrahedral sites. The magnetic hysteresis loops at room temperature showed decrease in both, coercivity and saturation magnetization as the nonmagnetic Al3+ ions content increases. The relative values of M-r/M-s were found to be between 0.44 and 0.31 for the samples with a remarkable change in the squareness of the loops. This is highly beneficial for the microwave and memory devices applications of these nano sized ferrite system.
ISSN
:
1533-4880
Journal Name
:
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume
:
162
Issue Number
:
5
Publishing Year
:
1437 AH
2016 AD
Article Type
:
Article
Added Date
:
Thursday, August 10, 2017
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
H.M Zaki,
Zaki, H.M
Investigator
Doctorate
s.h (Al-Heniti
(Al-Heniti, s.h
Researcher
Doctorate
Yas Al-Hadeethi
Al-Hadeethi, Yas
Researcher
Doctorate
A.M Alsanoosi,
Alsanoosi,, A.M
Researcher
Doctorate
Files
File Name
Type
Description
42576.pdf
pdf
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