Effect of Co 2 Y additive on power loss of Ni 0.8 Zn 0.2 Fe 2 O 4 ferrites

Ba2Co2Fe12O22 (Co2Y, 0 wt%, 2 wt%)-added Ni0.8Zn0.2Fe2O4 polycrystalline ferrites are prepared by solid-state reaction method, and the magnetic properties of ferrites are investigated. Magnetic measurements show that the magnetic loss is obviously decreased with Co2Y addition. Loss separation reveals that both hysteresis loss and eddy current loss reduce significantly after Co2Y addition. The mechanism of magnetic loss decreasing due to Co2Y additive is discussed, and the decrease of magnetic hysteresis loss and eddy current loss caused by Co2+ cation doping was regarded as the main reason for the observed power loss decrease in ferrites and insulating grain boundary composed by barium compound which plays a role in decreasing eddy current loss. The Q value of Co2Y-added Ni0.8Zn0.2Fe2O4 ferrite was much higher than that of Ni0.8Zn0.2Fe2O4 sample which can be used as inductors for high-frequency applications.