Title :
Ferromagnetic Resonance and Microwave Behavior of ASn-Substituted (A=Ni-Co-Zn) BaM-Hexaferrites
Author :
Pasquale, Massimo ; Perero, Sergio ; Lisjak, Darja
Author_Institution :
INRIM, Torino
fDate :
6/1/2007 12:00:00 AM
Abstract :
ASn-substituted BaM-hexaferrites with compositions BaFe12-2x AxSnxO19, where A = Co, Ni, Zn, and x=0.5--2, were synthesized using a solid-state reaction at 1100-1300 degC. Hexaferrites formation was controlled by X-ray powder diffraction. The static magnetic properties were determined and the ferromagnetic resonance frequency of the powders was obtained using a vector network analyzer and a coplanar waveguide. It is shown that the degree of substitution (x) has a strong influence both on the static magnetic and the microwave behavior of the ceramics. Due to the changes in the anisotropy and saturation magnetization, the ferromagnetic resonance frequency shows a considerable decrease, from the 48 GHz for pure BaFe12O19, to about 10-20 GHz for samples with xap0.5,1
Keywords :
X-ray diffraction; barium compounds; ceramics; coplanar waveguides; ferrites; ferromagnetic resonance; magnetic anisotropy; 1100 to 1300 degC; BaFe12-2xCoxSnxO19; BaFe12-2xNixSnxO19; BaFe12-2xZnxSnxO19; X-ray powder diffraction; anisotropy; ceramics; coplanar waveguide; ferromagnetic resonance frequency; hexaferrites; microwave property; saturation magnetization; solid-state reaction; static magnetic properties; vector network analysis; Magnetic analysis; Magnetic properties; Magnetic resonance; Network synthesis; Powders; Resonant frequency; Saturation magnetization; Solid state circuits; X-ray diffraction; Zinc; Ferromagnetic resonance; hard ferrites; microwave filters;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.893773
