Tunable electromagnetic properties in barium hexagonal ferrites with dual-ion substitution

The electromagnetic properties in hexagonal ferrites are intrinsically associated with the crystalline structure. In this work, structural engineering via the chemical dual-ion substitution of Ni2+ and Zr4+ for Fe3+ in barium hexaferrites BaNixZrxFe12-2xO19 (x = 0, 0.1, 0.3, 0.5, 0.7 and 0.9) is exploited in demonstrating the tunability of electromagnetic properties. The effects of coupled substitution on structural, dielectric, magnetic and microwave absorbing properties were carried out. The well-defined and purified structure were confirmed in the barium hexaferrites. It is found that dual-ion chemical substitution not only promotes the dielectric polarization but also improves the magnetic ordering, which subsequently increases the electromagnetic loss and adjusts impedance matching. Enhanced reflection loss (RL) in modified barium hexaferrite with broadened absorption bandwidth will find widespread application in electromagnetic compatibility or stealth fields.

Automated summary

The study demonstrates the tunability of electromagnetic properties in hexagonal ferrites through structural engineering via chemical dual-ion substitution. It was found that the dual-ion substitution enhances dielectric polarization, improves magnetic ordering, increases electromagnetic loss, and adjusts impedance matching in barium hexaferrites. Enhanced reflection loss in modified barium hexaferrite with broadened absorption bandwidth will have wide applications in electromagnetic compatibility or stealth fields.