Title :
Microwave Characterization of Partially Magnetized Ferrites
Author :
Green, Jerome J. ; Sandy, Frank
fDate :
6/1/1974 12:00:00 AM
Abstract :
In order to assist the microwave engineer in predicting the performance of partially magnetized devices, we have characterized the microwave permeability of partially magnetized materials. The real part of the tensor permeability elements, μ, κ, and μz, depends primarily on the parameters γ4πM/ω and γ4πMs / ω. Empirical formulas have been developed which show the dependence. At frequencies sufficiently below ω = π4πMs, the loss can be characterized by the value of μ´´ at 4πM = 0.μ, κ, and μz depend weakly on composition, whereas μ´´ (4πM = 0) does depend upon the chemical composition.
Keywords :
Demagnetization; Ferrites; Frequency; Magnetic devices; Magnetic field measurement; Magnetic materials; Microwave devices; Permeability measurement; Saturation magnetization; Tensile stress;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.1974.1128306