Effect of cobalt substitution on magnetic properties of Ba4Ni2−xCoxFe36O60 hexaferrite

Xiaona Jiang; Songze Li; Zhong Yu; Vincent G. Harris; Zhijuan Su; Ke Sun; Chuanjian Wu; Rongdi Guo; Zhongwen Lan

doi:10.1063/1.5007750

AIP Advances (May 2018)

Effect of cobalt substitution on magnetic properties of Ba4Ni2−xCoxFe36O60 hexaferrite

Xiaona Jiang,
Songze Li,
Zhong Yu,
Vincent G. Harris,
Zhijuan Su,
Ke Sun,
Chuanjian Wu,
Rongdi Guo,
Zhongwen Lan

Affiliations

Xiaona Jiang: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Songze Li: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Zhong Yu: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Vincent G. Harris: Department of Electrical and Computer Engineering, Northeastern University, Boston, Massachusetts 02115, USA
Zhijuan Su: Department of Electrical and Computer Engineering, Northeastern University, Boston, Massachusetts 02115, USA
Ke Sun: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Chuanjian Wu: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Rongdi Guo: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Zhongwen Lan: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

DOI: https://doi.org/10.1063/1.5007750
Journal volume & issue: Vol. 8, no. 5
pp. 056218 – 056218-5

Abstract

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Co-substituted U-type hexagonal ferrite bulks, with composition of Ba4Ni2−xCoxFe36O60 (x=0.2, 0.4, 0.6, 0.8), were prepared by a conventional ceramic method. Saturation magnetization (4πMs), coercivity (Hc), and Curie temperature (Tc) were investigated. Anisotropy constant (K1) was calculated by fitting the magnetization curve (M-H) according to the law of approach to saturation, and anisotropy field (Ha) was calculated accordingly. The results reveal that all the samples possess the U-type hexagonal crystallographic structure. With increasing cobalt substitution content (x), the lattice parameters (a and c) almost remain the same owing to the similar radii of Ni2+ (0.72 Å) Co2+ (0.74 Å) ions. 4πMs goes up, while Hc Hc shows an opposite trend. K1 and Ha monotonously decrease resulting from that cobalt substitution weakens the c-axis orientation. Additionally, Tc increases from 467 °C to 484 °C.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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