title: High-Magnetization FeCo Nanochains with Ultrathin Interfacial Gaps for Broadband Electromagnetic Wave Absorption at Gigahertz.
abstract: Superparamagnetic FeCo nanochains consisting of assembled ∼25 nm nanoparticles and ∼1 nm gaps are synthesized by facial wet-chemical route and exhibit significant electromagnetic absorption at gigahertz. Both the dielectric and magnetic loss factors present dual-resonance behaviors at 2-18 GHz frequencies, originated from the asymmetric architecture of the cubic FeCo particles that assembled in a one-dimensional chain structure. Theoretical analyses uncover that the origins of the enhancement of electromagnetic losses are ascribed to the high magnetization (228 emu/g) and the ultrathin gaps (∼1 nm), which enhances the Snoek limit and induces anisotropic dielectric polarizations, consequently constructing a proper electromagnetic match.
authors.affiliation: Key Laboratory for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University , Shenyang 110819, People's Republic of China.
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Key Laboratory for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University , Shenyang 110819, People's Republic of China.
authors.forename: Yixing
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University , Shenyang 110819, People's Republic of China.
authors.forename: Rongge
authors.initials: R
authors.lastname: Liu
authors.affiliation: Key Laboratory for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University , Shenyang 110819, People's Republic of China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Rao
authors.affiliation: Key Laboratory for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University , Shenyang 110819, People's Republic of China.
authors.forename: Huawei
authors.initials: H
authors.lastname: Rong
authors.affiliation: Key Laboratory for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University , Shenyang 110819, People's Republic of China.
authors.forename: Gaowu
authors.initials: G
authors.lastname: Qin
keywords: FeCo; dielectric; electromagnetic; magnetization; microwave absorption