Effects of La substitution on micromorphology, static magnetic properties and low ferromagnetic resonance linewidth of self-biased M-type Sr hexaferrites for high frequency application

doi:10.1016/j.ceramint.2020.12.020

	Effects of La substitution on micromorphology, static magnetic properties and low ferromagnetic resonance linewidth of self-biased M-type Sr hexaferrites for high frequency application
	Dai, Yue 1; Lan, Zhongwen 1; Yu, Zhong 1; Sun, Ke 1; Guo, Rongdi 1; Wu, Guohua 1; Jiang, Xiaona 1; Wu, Chuanjian 1; Liu, Yu 1; Liu, Hai 1
刊名	CERAMICS INTERNATIONAL
	2021-04-01
卷号	47
关键词	M-type Sr hexaferrites High frequency Micromorphology Static magnetic properties FMR linewidth
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2020.12.020
通讯作者	Lan, Zhongwen(zwlan@uestc.edu.cn)
英文摘要	M-type Sr (SrM) hexaferrites have been widely applied in millimetre/microwave ferrite devices such as circulators and isolators. SrM hexaferrites must exhibit a high remanence ratio M-r/M-s, a high anisotropy field H-a, and a low ferromagnetic resonance (FMR) linewidth Delta H to further develop millimetre/microwave equipment and devices with high frequencies, miniaturisation, and planarisation. However, it is difficult for M-type hexaferrite to simultaneously meet the requirements of high M-r/M-s, high H-a, and low Delta H, which are key to realising high-frequency self-biased ferrite devices. In this work, Ca-La-Co-substituted SrM ferrite was prepared, and the influence of La substitution on the micromorphology, static magnetic properties, and Delta H values of SrM hexaferrites is discussed in detail. The results demonstrated that as the La substitution content x increased from 0.0 to 0.5, the saturation magnetisation 4 pi M-s and coercivity H-c initially increased, and then decreased. The H-a values of all samples were higher than 18 kOe. The FMR linewidth Delta H initially increases, and then decreased after reaching a maximum value at x = 0.2. The independent grain approximation theory was used to analyse the changing trend of the FMR linewidth. The results showed that the crystalline anisotropy linewidth Delta H-a accounted for a larger proportion of the FMR linewidth than the porosity linewidth Delta H-p. The sample with a La substitution content x of 0.3, exhibited the best performance (4 pi M-s = 3915 Gs, 4 pi M-r = 3387 Gs, H-c = 1818 Oe, M-r/M-s = 0.865, large H-a = 23.99 kOe, and Delta H = 1548 Oe at 58.8 GHz). The materials prepared in this research have significant potential for application in high-frequency self-biased devices and microwave engineering.
资助项目	National Natural Science Foundation of China[U1732275]
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000624022000001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/120832]
专题	中国科学院合肥物质科学研究院
通讯作者	Lan, Zhongwen
作者单位	1.Univ Elect Sci & Technol China, Sch Mat & Energy, Chengdu 610054, Peoples R China 2.Chinese Acad Sci, High Field Magnet Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Dai, Yue,Lan, Zhongwen,Yu, Zhong,et al. Effects of La substitution on micromorphology, static magnetic properties and low ferromagnetic resonance linewidth of self-biased M-type Sr hexaferrites for high frequency application[J]. CERAMICS INTERNATIONAL,2021,47.
APA	Dai, Yue.,Lan, Zhongwen.,Yu, Zhong.,Sun, Ke.,Guo, Rongdi.,...&Tong, Wei.(2021).Effects of La substitution on micromorphology, static magnetic properties and low ferromagnetic resonance linewidth of self-biased M-type Sr hexaferrites for high frequency application.CERAMICS INTERNATIONAL,47.
MLA	Dai, Yue,et al."Effects of La substitution on micromorphology, static magnetic properties and low ferromagnetic resonance linewidth of self-biased M-type Sr hexaferrites for high frequency application".CERAMICS INTERNATIONAL 47(2021).