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Study of Structural and Magnetic Properties of Spinel Zn Doped Cobalt Ferrites

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Abstract:

Herein, the spinel Co1-xZnxFe2O4 (x = 0.0, 0.2, 0.4 and 0.6) powder samples have been prepared by the solid-state reaction method. We have carried out the measurements of crystal structure, element analysis, material characterization, magnetic property and Curie temperature using the X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and vibrating sample magnetometer, and the first-principles calculations within the framework of the density functional theory (DFT). The EDS measurement indicates that the Co1-xZnxFe2O4 powder samples have been successfully synthesized and exhibited the cubic spinel structures. Both the lattice constant and crystallite size increase with the Zn concentration due to the larger ionic radius of Zn2+ ion than the Co2+ ion. The concentration ratio of the Co2+ and Co3+ ions can be predicted by the distribution of cations between the A and B sites by the XPS measurement. For the magnetic properties, the residual magnetization, coercivity and Curie temperature decrease monotonically as the Zn concentration increases, while the saturation magnetization initially increases and then decreases at the room temperature. For the Co0.8Zn0.2Fe2O4 sample, the magnetic saturation reaches the maximum value of 62.98 Am2kg-1, due to a large amount of the Co3+ ions. The adequate replacement of Zn ion for the Co site can improve the magnetic properties of spinel Co1-xZnxFe2O4 powders, and effectively regulates the Curie temperature.

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Periodical:

Solid State Phenomena (Volume 310)

Pages:

124-133

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.310.124

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Online since:

September 2020

Authors:

B. Chun Feng, Ojiyed Tegus, T. Ochirkhyag, Dorj Odkhuu, Namsrai Tsogbadrakh*, Deleg Sangaa, Jav Davaasambuu

Keywords:

CoFe2O4, Curie Temperature, DFT, EDS, Magnetism, XPS, X-Ray Diffraction (XRD)

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© 2020 Trans Tech Publications Ltd. All Rights Reserved

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