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

被引：14

作者：

Jiang, Xiaona ^{[1
]}

Li, Songze ^{[1
]}

Yu, Zhong ^{[1
]}

Harris, Vincent G. ^{[2
]}

Su, Zhijuan ^{[2
]}

Sun, Ke ^{[1
]}

Wu, Chuanjian ^{[1
]}

Guo, Rongdi ^{[1
]}

Lan, Zhongwen ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Sichuan, Peoples R China

[2] Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA

来源：

AIP ADVANCES | 2018年 / 8卷 / 05期

关键词：

CO;

D O I：

10.1063/1.5007750

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Co-substituted U-type hexagonal ferrite bulks, with composition of Ba4Ni2-xCoxFe36 O-60 (x= 0.2, 0.4, 0.6, 0.8), were prepared by a conventional ceramic method. Saturation magnetization (4 pi Ms), coercivity (H-c), and Curie temperature (T-c) were investigated. Anisotropy constant (K-1) was calculated by fitting the magnetization curve (M-H) according to the law of approach to saturation, and anisotropy field (H-a) 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 angstrom) Co2+ (0.74 angstrom) ions. 4 pi Ms goes up, while H-c H-c shows an opposite trend. K-1 and H-a monotonously decrease resulting from that cobalt substitution weakens the c-axis orientation. Additionally, Tc increases from 467 degrees C to 484 degrees C. (C) 2018 Author(s).

引用

页数：5

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