Investigation of the optical, magnetic, and radar absorption characteristics of CoxFe3-xO4/ZnO/graphite nanocomposites

Moh Masfi Anan Yahya, ST Ulfawanti Intan Subadra, Rosy Eko Saputro, Ahmad Taufiq, Chusnana Insjaf Yogihati, Sunaryono, Erfan Handoko, Mudrik Alaydrus, Tahta Amrillah, Samian

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2 Citations (Scopus)


In this study, we have successfully prepared CoxFe3-xO4/ZnO/graphite nanocomposites [x = 0, 0.1, 0.2, 0.3, 0.4, 0.5] as radar-absorbing materials. The X-ray diffraction characterization results signified that the crystallite size of CoxFe3-xO4 in the nanocomposites increased from 8.5 nm to 11 nm as x increased. However, the crystallite sizes of ZnO and graphite were constant at around 55.1 and 25.8 nm, respectively. The presence of such phases was also detected at the wavenumbers of 400–560, 678, and 1637 cm−1, originating from M − O [M = Fe, Co], Zn–O, and C[dbnd]C bonds, respectively. The energy-dispersive X-ray spectra also showed the presence of Fe, Co, Zn, and C as constituents of the nanocomposites. The optical absorption of the nanocomposites was observed at a wavelength of 390 nm, showing bandgap values of 2.991–3.029 eV. The nanocomposites had superparamagnetic features, with magnetic saturation values between 12.78 and 25.27 emu/g, which decreased following the increase in x composition. Interestingly, the CoxFe3-xO4/ZnO/graphite nanocomposites attained a maximum reflection loss of −32.26 dB at the frequency of 11.82 GHz. In general, the reflection loss increased following the increase in x composition. Therefore, the prepared CoxFe3-xO4/ZnO/graphite nanocomposites can be a potential candidate as radar-absorbing materials with excellent performance.

Original languageEnglish
Article number107683
JournalMaterials Science in Semiconductor Processing
Publication statusPublished - Oct 2023


  • CoFeO/ZnO/Graphite
  • Nanocomposite
  • Radar absorption
  • Reflection loss
  • Superparamagnetic


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