Synthesis of NiCexFe(2-x)O4 (0 ≤ x ≤ 0.05) as Microwave Absorbing Materials via Solid-State Reaction Method

• Published in: Journal of magnetism and magnetic materials 2021-08, Vol.532, p.1, Article 167985
• Main Authors: Yunasfi, Mulyawan, Ade, Mashadi, Suyanti, Ari Adi, Wisnu
• Format: Article
• Language: English
• Subjects: Cerium; Coercivity; Composition; Crystallization; Lattice parameters; Magnetic properties; Magnetic saturation; Magnetization; Microwave absorbing materials; Microwave absorption; Microwave attenuation; Network analysers; Nickel ferrite; Nickel ferrites; Remanence; Solid state; Solid-state reaction; Substitution reactions
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2021.167985

[Display omitted] •The NiCexFe(2-x)O4 as microwave absorber materials was synthesized by milling technique.•A single-phase of nickel ferrite doped by cerium were formed in all compositions.•Ce substituted nickel ferrite turns out to produce high permeability and permittivity complex values.•This composition offers a promising candidate material in the application of microwave absorbent materials. In this work, a profound study has been carried out on the microwave absorbing materials in NiCexFe(2-x)O4 (x = 0.0, 0.01, 0.03, and 0.05) spinel ferrites. The series of NiCexFe(2-x)O4 composition were synthesized by solid state reaction method. The Rietveld refinement of X-ray diffraction (XRD) profiles showed that all compositions were crystallized into a single-phase of nickel ferrite (NiFe2O4, space group Fd-3 m). The lattice constant was found to decrease from 8.3346 Å to 8.3310 Å with the increasing substitution of Ce3+ from  x= 0.0 to 0.05. The surface morphological observation by Scanning Electron Microscope (SEM) revealed that the particle size decreased with the increasing of Ce3+ ions substitution. The magnetic properties parameters such as saturation magnetization (Ms), remanence magnetization (Mr), and coercivity (Hc) were obtained from magnetic-hysteresis (M−H) curves. The Ms were decreased (from 49.7 to 26.8 emu/g) whereas the μ0Hc was increased (from 154 to 188 Oe) with increasing substitution of Ce3+ in the NiCexFe(2-x)O4 series. The microwave absorption performance obtained from the Vector Network Analyzer (VNA) measurement showed that the increasing substitution of Ce3+ will enhance the microwave attenuation from 91.25% to 98.59%. It is expected that the composition of  x= 0.05 (NiCe0.05Fe1.95O4) can be used as a reference to design new microwave absorbing materials.