High-entropy spinel ferrites MFe2O4 (M = Mg, Mn, Fe, Co, Ni, Cu, Zn) with tunable electromagnetic properties and strong microwave absorption

Abstract Ferrites are the most widely used microwave absorbing materials to deal with the threat of electromagnetic (EM) pollution. However, the lack of sufficient dielectric loss capacity is the main challenge that limits their applications. To cope with this challenge, three high-entropy (HE) spinel-type ferrite ceramics including (Mg 0.2 Mn 0.2 Fe 0.2 Co 0.2 Ni 0.2 )Fe 2 O 4 , (Mg 0.2 Fe 0.2 Co 0.2 Ni 0.2 Cu 0.2 )Fe 2 O 4 , and (Mg 0.2 Fe 0.2 Co 0.2 Ni 0.2 Zn 0.2 )Fe 2 O 4 were designed and successfully prepared through solid state synthesis. The results show that all three HE MFe 2 O 4 samples exhibit synergetic dielectric loss and magnetic loss. The good magnetic loss ability is due to the presence of…

• NN
  National Natural Science Foundation of China

  Awards: 51972089, 51802289