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Trends of parallel microstructure and magnetic properties evolution in Co0.5Zn0.5Fe2O4


Muhammad Zulkimi, Muhammad Misbah and Hashim, Mansor and Ismail, Ismayadi and Azis, Raba'ah Syahidah and Kanagesan, Samikannu and Mustaffa, Muhammad Syazwan and Mohd Zawawi, Mohd Khairul Ikhwan (2014) Trends of parallel microstructure and magnetic properties evolution in Co0.5Zn0.5Fe2O4. Journal of Superconductivity and Novel Magnetism, 27 (8). 1903-1910 . ISSN 1557-1939; ESSN: 1557-1947


The present paper reports on an effort to expose and scientifically explain the microstructure–magnetic properties relationship as they evolve with increasing sintering temperature. Mechanical alloying was used to prepare cobalt–zinc ferrite nanoparticles with sintering temperature from 800 to 1,350 °C with 50 °C increment. The microstructure of the samples was observed using a field emission scanning electron microscope, and the magnetic parameters, such as the real permeability and loss factor, were measured at room temperature in the frequency range from 10 MHz to 1.0 GHz using an Agilent 4291B impedance/material analyzer. The B–H hysteresis of the samples was investigated using a MATS-2010SD Static Hysteresisgraph. From the results, the real permeability and loss factor were observed to increase up to 1,250 °C. These increases corresponded to increases in grain size and are mainly due to easier domain wall movement. However, due to zinc loss, μ′ and μ′′ as well as the saturation induction decreased from 1,300 to 1,350 °C. The coercivity increased up to 850 °C and decreased with increasing temperature. This increasing-to-decreasing coercivity trend corresponded well with the single- to multi-domain grain size transition marked by critical grain size at about 0.13 μm.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Institute of Advanced Technology
DOI Number: https://doi.org/10.1007/s10948-014-2520-5
Publisher: Springer
Keywords: Magnetic properties; Microstructure; Mechanical alloying; Spinel
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 11 Feb 2016 05:06
Last Modified: 21 Apr 2017 09:35
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s10948-014-2520-5
URI: http://psasir.upm.edu.my/id/eprint/35897
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