Title :
Precision transmittance measurements on ferrites in millimeter waves
Author :
Korolev, K.A. ; Chen, S. ; Afsar, M.N.
Author_Institution :
Dept. of Electr. & Comput. Eng., Tufts Univ., Medford, MA, USA
Abstract :
This paper presents transmittance spectra and complex magnetic permeability and dielectric permittivity parameters of pure and mixed powdered barium ferrites, nickel zinc manganese ferrites and nickel cobalt copper ferrites in a broad-band millimeter wave frequency range. A free space, millimeter wave magneto-optical approach has been successfully employed for precise characterization of ferrite materials. Frequency dependences of the magnetic permeability of ferrites have been calculated using Schlomann´s equation for partially magnetized ferrites.
Keywords :
barium compounds; cobalt compounds; copper compounds; ferrites; magnetic particles; magnetic permeability; magneto-optical effects; manganese; millimetre wave spectra; nickel compounds; permittivity; zinc compounds; BaFe12O19; Ni1-x-yCoxCuyFe2-z-dMnzO4; Ni1-xZnxFe2-yMnyO4; Schlomann equation; barium ferrites; broad-band millimeter wave frequency range; complex dielectric permittivity; complex magnetic permeability; free space magneto-optical approach; frequency dependence; millimeter wave magneto-optical approach; mixed powdered ferrites; nickel cobalt copper ferrites; nickel zinc manganese ferrites; partially magnetized ferrites; precision transmittance measurements; pure ferrites; Barium; Dielectric measurements; Ferrites; Frequency; Magnetic materials; Millimeter wave measurements; Nickel; Permeability; Permittivity measurement; Zinc;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
DOI :
10.1109/CPEM.2008.4574890
