Title :
Noise characteristics of Co-based amorphous tapes to be applied as magnetic shielding shell for magnetic shaking
Author :
Sasada, Ichiro ; Shiokawa, Masahiro
Author_Institution :
Dept. of Appl. Sci. for Electron. & Mater., Kyushu Univ., Fukuoka, Japan
Abstract :
In order to seek a magnetic shell material of low magnetic noise under magnetic shaking, fluctuations of the magnetization under the 1 kHz excitation are characterized and compared to the Barkhausen noise (BHN) under the sine-current excitation of 2 Hz. Two Co-based amorphous magnetic tapes, Metglas 2705M and 2714A, are examined. Measurements were carried out in a cylindrical magnetic shield with two identical toroidal samples to cancel the fundamental component and harmonics of the excitation voltage. Induced voltages in the frequency range less than 500 Hz were considered as fluctuation noise. A good correlation between fluctuation noise and BHN was confirmed for both samples. Metglas 2705M has high shaking efficiency but higher noise than Metglas 2714A.
Keywords :
Barkhausen effect; amorphous magnetic materials; cobalt alloys; ferromagnetic materials; fluctuations; magnetic noise; magnetic permeability; magnetic shielding; metallic glasses; 500 Hz; Co-based amorphous magnetic tapes; Co-based amorphous tapes; Metglas 2705M; Metglas 2714A; cylindrical magnetic shield; identical toroidal samples; low magnetic noise; magnetic shaking; magnetic shielding shell; magnetization fluctuations; noise characteristics; sine-current excitation; Amorphous magnetic materials; Amorphous materials; Fluctuations; Magnetic materials; Magnetic noise; Magnetic shielding; Magnetization; Noise cancellation; Toroidal magnetic fields; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.816174
