Magnetic After-Effects in Barium Hexagonal Ferrites with BaO·6Fe₂O₃ (M-Type) Stoichiometry

M-Type Barium Hexagonal Ferrite Films

Microstructural and high-frequency magnetic characteristics of W-type barium ferrites doped with V2O5

The microstructure, static, and dynamic magnetic properties have been investigated for BaCoZnFe16O27 doped with small amounts of V2O5 from 0 to 1.5 wt %. The results show that the doping of V2O5 can significantly improve the dynamic properties of W-type barium ferrites at microwave frequency. As compared to the undoped sample, the permeabilities m08 and mmax 9 increase by about 42% and 67%, res...

Dipolar Magnetic Anisotropy in Some Uniaxial Hexagonal Ferrites

Calculations for the magnetic dipolar contribution to the magnetic anisotropy of BaFeizOie and LaFeiiZnOie M-type and BaFerMn2Oil A-type hexagonal ferrites have been made. Our calculations take into account all the magnetic moments existing within a sphere with a radius of 118 1, from which good eonvergenee is reached. The results for there ferrite# suggest that the strong magnetic enisotropy i...

Millimeter wave notch filters based on ferromagnetic resonance in hexagonal barium ferrites

A hexagonal ferrite-based millimeter wave notch filter was demonstrated. The filter consists of an M-type BaFe12O19 BaM slab sitting on top of a stripline. The band-stop filtering response originates from the ferromagnetic resonance absorption in the BaM slab. The BaM slab has an in-plane uniaxial anisotropy field of 17 kOe. This anisotropy field facilitates the operation of the filter beyond 5...

Interaction effects and energy barrier distribution on the magnetic relaxation of nanocrystalline hexagonal ferrites

The static and dynamic magnetic properties of nanocrystalline BaFe10.4Co0.8Ti0.8O19 M -type doped barium ferrite were studied in detail to clarify the effect of interactions on the magnetic relaxation of an assembly of small particles. The logarithmic approximation was unable to account for the magnetic relaxation of the sample. Interaction effects were analyzed from the low-field susceptibilit...