Title :
Textured Sc-Doped Barium–Ferrite Compacts for Microwave Applications Below 20 GHz
Author :
Sakai, Tomokazu ; Chen, Yajie ; Chinnasamy, C.N. ; Vittoria, C. ; Harris, V.G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ.
Abstract :
Sc is substituted for Fe in Ba M-type hexaferrite to reduce the anisotropy field and shift the ferromagnetic resonance (FMR) frequency to below 20 GHz. We have produced pure phase BaFe11 ScO19 powders having a platelet microstructure. These materials are pressed under an applied magnetic field of 95.5times10 5 A/m. Resulting compacts are sintered and are shown to have a clear uniaxial anisotropy with the c-axis perpendicular to the surface plane. Hysteresis loops display a squareness of 0.83 with a coercivity of ~186 kA/m. The X-band FMR power derivative linewidth is measured to be 79.6 kA/m
Keywords :
barium compounds; ferrite devices; ferrites; ferromagnetic resonance; magnetic microwave devices; scandium compounds; BaFeScO; anisotropy field; ferromagnetic resonance frequency; hexaferrite; hysteresis loops; magnetic field; microwave applications; platelet microstructure; power derivative linewidth; textured barium-ferrite compacts; uniaxial anisotropy; Anisotropic magnetoresistance; Displays; Iron; Magnetic fields; Magnetic hysteresis; Magnetic materials; Magnetic resonance; Microstructure; Powders; Resonant frequency; BaFe; ferromagnetic resonance (FMR); textured compacts;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.879639
