Magnetic Energy Morphing, Capacitive Concept for Ni0.3Zn0.4Ca0.3Fe2O4Nanoparticles Embedded in Graphene Oxide Matrix, and Studies of Wideband Tunable Microwave Absorption

• DOI: 10.1021/acsami.1c10241
• Publication Date: 2021-10-06T23:47:49Z
• Authors: Chandi Charan Dey; Sukhendu Sadhukhan; Ayan Mitra; Madhumita Dalal; Anirban Shaw; Anna Bajorek; Pabitra K. Chakra...
• Keywords: Nyquist plot; Rietveld Refinement

Nanoparticles of Ni0.3Zn0.4Ca0.3Fe2O4 (NZCF) were successfully prepared by the facile wet chemical method coupled with sonochemical method. These nanoparticles embedded in a graphene oxide (GO) matrix (NZCFG). Rietveld analyses X-ray diffraction, transmission electron microscope, scanning and photoelectron spectroscopy carried out to extract different relevant information regarding structure, morphology, ionic state. A major improvement saturation magnetization is achieved due substitution Ca2+ ferrite lattice. Interestingly, observed value electromagnetic absorption for sample thickness 1.5 mm ∼−67.7 dB at 13.3 GHz, corresponding bandwidth 5.73 GHz. The Cole–Cole plot, Jonscher power-law fitting, Nyquist plot confirm probability improved hopping conductance attractive capacitive behavior NZCFG. presence magnetic energy morphing combination higher attenuation constant, lower skin depth, various forms resonance relaxation makes NZCFG most suitable microwave absorption.