title: Interface Strategy To Achieve Tunable High Frequency Attenuation.
abstract: Among all polarizations, the interface polarization effect is the most effective, especially at high frequency. The design of various ferrite/iron interfaces can significantly enhance the materials' dielectric loss ability at high frequency. This paper presents a simple method to generate ferrite/iron interfaces to enhance the microwave attenuation at high frequency. The ferrites were coated onto carbonyl iron and could be varied to ZnFe2O4, CoFe2O4, Fe3O4, and NiFe2O4. Due to the ferrite/iron interface inducing a stronger dielectric loss effect, all of these materials achieved broad effective frequency width at a coating layer as thin as 1.5 mm. In particular, an effective frequency width of 6.2 GHz could be gained from the Fe@NiFe2O4 composite.
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 210016, P.R, China.|School of Materials Sciences and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798.
authors.forename: Hualiang
authors.initials: H
authors.lastname: Lv
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 210016, P.R, China.
authors.forename: Haiqian
authors.initials: H
authors.lastname: Zhang
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 210016, P.R, China.
authors.forename: Guangbin
authors.initials: G
authors.lastname: Ji
authors.affiliation: School of Materials Sciences and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798.
authors.forename: Zhichuan J
authors.initials: ZJ
authors.lastname: Xu
keywords: carbonyl iron; coating; dielectric loss; ferrite; microwave absorption; polarization