Title :
Permeability of Fine Magnetic Particles: Measurements, Calibration, and Pitfalls
Author :
Lee, Dok Won ; Wang, Shan X. ; Tang, Yun Jun ; Hong, Jung-Il ; Berkowitz, Ami E.
Author_Institution :
Dept. of Mater. Sci. & Eng., Stanford Univ.
Abstract :
High-frequency permeability spectra of FeSiB coatings prepared with spark-eroded magnetic particles were studied. In order to measure the relative permeability of FeSiB coatings with low permeability more accurately, the calibration procedure of the existing permeameter was modified. The modified permeability spectra indicate that FeSiB coatings have the relative permeability below 10 and appreciable losses at frequencies above ~20 MHz. Permeability spectra of CoTaZr amorphous films with the relative permeability above 600 were used for the comparison
Keywords :
amorphous magnetic materials; cobalt compounds; iron compounds; magnetic particles; magnetic permeability measurement; magnetic thin films; silicon compounds; tantalum compounds; CoTaZr; FeSiB; amorphous films; amorphous magnetic films; high-frequency permeability spectra; magnetic particle calibration; magnetic particle measurements; permeability measurement; spark erosion method; spark-eroded magnetic particles; Amorphous magnetic materials; Amorphous materials; Calibration; Coatings; Frequency; Magnetic films; Magnetic particles; Particle measurements; Permeability measurement; Saturation magnetization; Amorphous magnetic films; FeSiB magnetic particles; permeability measurement; spark erosion method;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.878872
