Magnetic properties and microwave absorption of Ni0.7Zn0.3A0.05Fe1.95O4 (A = La, Ce, and Nd) powders within the range of 2–18 GHz. Issue 20 (15th October 2021)

• Record Type: Journal Article
• Authors: Liu, Yuan; Li, Rong; Wang, Wei; Qing, Yuchang
• Is Part Of: Ceramics international. Volume 47:Issue 20(2021)
• Page Start: 28764
• Page End: 28769
• Publication Date: 2021-10-15
• Subjects: Ni0.7Zn0.3Fe2O4 -- Magnetic properties -- Electromagnetic properties -- Microwave absorption; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.07.036
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Ni0 . 7 Zn0.3 A0.05 Fe1 . 95 O4 (A = La, Ce, and Nd) powders were obtained by the sol-gel combustion technique. The phase composition, microstructure, and electromagnetic properties of La 3+, Ce 3+, and Nd 3+ substituted Ni0 . 7 Zn0 . 3 Fe2 O4 were investigated. Compared with the Ni0 . 7 Zn0 . 3 Fe2 O4 ferrite, the saturation magnetization of substituted Ni0 . 7 Zn0 . 3 Fe2 O4 powders decreases due to the reduction of the super-exchange interaction by the substitution of La 3+, Ce 3+, and Nd 3+ at the Fe site. Furthermore, the enhanced dielectric constant of the substituted Ni0 . 7 Zn0 . 3 Fe2 O4 ferrites prompts to the formation of good impedance matching and thereby improving the microwave absorption performance. The best reflection loss of Ni0 . 7 Zn0 . 3 Ce0 . 05 Fe1 . 95 O4 ferrite is −17.5 dB at 13.8 GHz, and the corresponding absorption bandwidth (RL ≤ 5 dB) can be achieved 10.9 GHz. These results suggested that the Ni0 . 7 Zn0 . 3 Ce0 . 05 Fe1 . 95 O4 ferrite is a potential composite for electromagnetic applications, particularly for broadband microwave absorption.