CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Enhanced structural and magnetic properties of microwave sintered Li-Ni-Co ferrites prepared by sol-gel method |
Nandeibam Nilima1, M Maisnam2, Sumitra Phanjoubam3 |
1 Department of Physics, Oriental College, Takyel, Imphal-795001, India; 2 Department of Physics, NIT Manipur, Langol, Imphal-795004, India; 3 Department of Physics, Manipur University, Canchipur, Imphal-795003, India |
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Abstract The properties of lithium ferrites are very sensitive to chemical composition, synthesis method, and sintering techniques. Li-Ni-Co ferrites with compositional formula Li0.45-0.5xNi0.1CoxFe2.45-0.5xO4, where 0.00 ≤ x ≤ 0.1 in steps of 0.02 were prepared by chemical sol-gel method and sintered by microwave sintering technique. The x-ray diffraction patterns confirmed the formation of single phase with spinel structure in all the samples. The structural parameter viz. lattice constant, crystallite size, and x-ray density for these samples were studied and compared with those measured from samples of similar composition prepared by the sol-gel method and sintered by conventional sintering technique. Enhancement in the magnetic properties like Curie temperature, hysteresis parameters was observed by employing sol-gel synthesis combined with microwave sintering. The results obtained and mechanisms involved are discussed in the paper.
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Received: 19 November 2018
Revised: 05 December 2018
Published: 05 February 2019
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PACS:
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61.05.cp
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(X-ray diffraction)
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75.60.Ej
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(Magnetization curves, hysteresis, Barkhausen and related effects)
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75.60.Ch
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(Domain walls and domain structure)
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81.20.Fw
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(Sol-gel processing, precipitation)
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Corresponding Authors:
M Maisnam
E-mail: m_maisnam@yahoo.co.in
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Cite this article:
Nandeibam Nilima, M Maisnam, Sumitra Phanjoubam Enhanced structural and magnetic properties of microwave sintered Li-Ni-Co ferrites prepared by sol-gel method 2019 Chin. Phys. B 28 026101
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