Title :
Study of magnetic hardness in ring shaped polycrystalline soft magnetic garnets
Author :
Le Floc´h, M. ; Konn-Martin, A.M.
Author_Institution :
Lab. d´´Electron. et des Syst. de Telecommun., CNRS, Brest, France
fDate :
9/1/1990 12:00:00 AM
Abstract :
The Neel magnetic hardness was studied in polycrystalline soft magnetic materials. Results show different behaviors, varying with the state of the microstructure. When samples are porous to about 20%, the approach to saturation follows the Neel law with a magnetic hardness proportional to porosity. However, when samples have a regular distribution of defect-free grains with thin grain boundaries, the Neel law is no longer valid, and magnetic hardness has another definition involving a simple dependence on the effective anisotropy field
Keywords :
ferromagnetic properties of substances; Neel law; Neel magnetic hardness; defect-free grains; effective anisotropy field; magnetic hardness; microstructure; porosity; ring shaped polycrystalline soft magnetic garnets; thin grain boundaries; Coils; Demagnetization; Equations; Garnets; Magnetic anisotropy; Magnetic materials; Microstructure; Perpendicular magnetic anisotropy; Saturation magnetization; Soft magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
