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Effects of La doping on the structural and magnetic properties of Sr1−xLaxFe11.75Co0.10Zn0.15O19 hexagonal ferrites

Published online by Cambridge University Press:  11 May 2015

Yujie Yang ,
Fanhou Wang ,
Juxiang Shao ,
Duohui Huang ,
Zenghui Gao ,
Qilong Cao  and
Mingjie Wan
Yujie Yang*
Affiliation:
Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644000, People's Republic of China
Fanhou Wang
Affiliation:
Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644000, People's Republic of China
Juxiang Shao
Affiliation:
Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644000, People's Republic of China
Duohui Huang
Affiliation:
Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644000, People's Republic of China
Zenghui Gao
Affiliation:
Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644000, People's Republic of China
Qilong Cao
Affiliation:
Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644000, People's Republic of China
Mingjie Wan
Affiliation:
Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644000, People's Republic of China
*
a)Address all correspondence to this author. e-mail: loyalty-yyj@163.com
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Abstract

The M-type hexaferrite Sr1−xLaxFe11.75Co0.10Zn0.15O19 (0 ≤ x ≤ 0.7) magnetic powders and magnets were synthesized by the ceramic process. The phase constituents of the magnetic powders were analyzed by x-ray diffraction. There is a single magnetoplumbite phase in the magnetic powders with La content (0.2 ≤ x ≤ 0.4). For the magnetic powders containing La content (0 ≤ x ≤ 0.1) or (0.5 ≤ x ≤ 0.7), magnetic impurities coexist in the structure. The microstructures of the magnets were characterized by field emission scanning electron microscopy. The magnets consist of homogenously distributed ferrite particles with the hexagonal structures. The magnetic properties of the magnets were measured by a permanent magnetic measure equipment. The remanence, maximum energy product, and Hk/Hcj ratio of the magnets at x = 0.3 reach the maximum values. However, the intrinsic coercivity and magnetic induction coercivity of the magnets at x = 0.2 reach the maximum values.

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Articles
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Journal of Materials Research , Volume 30 , Issue 11 , 14 June 2015 , pp. 1844 - 1851
Copyright
Copyright © Materials Research Society 2015 

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Footnotes

Contributing Editor: Michael E. McHenry

References

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