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.

Volume

42

Issue

10

fYear

2006

Firstpage

3335

Lastpage

3337

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.878872

Filename

1704618