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Magnetic phase-transition dependence on nano-to-micron grain-size microstructural changes of mechanically alloyed and sintered Ni0.6Zn0.4Fe2O4


Citation

Mustaffa, Muhammad Syazwan and Hashim, Mansor and Azis, Raba'ah Syahidah and Ismail, Ismayadi and Kanagesan, Samikannu and Muhammad Zulkimi, Muhammad Misbah (2014) Magnetic phase-transition dependence on nano-to-micron grain-size microstructural changes of mechanically alloyed and sintered Ni0.6Zn0.4Fe2O4. Journal of Superconductivity and Novel Magnetism, 27 (6). pp. 1451-1462. ISSN 1557-1939; ESSN: 1557-1947

Abstract

The microstructure evolution in several polycrystalline Ni0.6Zn0.4Fe2O4 samples as a result of a sintering scheme was studied in detail, in parallel with the changes in their magnetic properties. The Ni0.6Zn0.4Fe2O4 toroidal sample was prepared via mechanical alloying and subsequent molding; the sample with nanometer-sized compacted powder was repeatedly sintered from 600 to 1200 °C with an increment of 25 °C. An integrated analysis of phase, microstructural and hysteresis data pointed to existence of three distinct shape-differentiated groups of B–H hysteresis loops which belong to samples with weak, moderate and strong magnetism (Idza in Mater. Res. Bull. 47:1345–1352, 2012), respectively. The real permeability, μ′, and loss factor, μ″, increased with grain size which increased due to increase in sintering temperature and these two magnetic properties also seem to belong to three value-differentiated groups corresponding to the same temperature ranges found for the B–H groupings. These groupings are tentatively explained using Snoek’s Law.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Institute of Advanced Technology
DOI Number: https://doi.org/10.1007/s10948-013-2453-4
Publisher: Springer
Keywords: Magnetic properties; Microstructure; Magnetic materials; Electron microscopy
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 15 Dec 2015 01:19
Last Modified: 21 Apr 2017 04:03
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s10948-013-2453-4
URI: http://psasir.upm.edu.my/id/eprint/34412
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