Title :
An elliptical cylinder-type shielding device using amorphous ribbons
Author :
Haga, A. ; Kikuchi, S. ; Nasuno, H.
Author_Institution :
Dept. of Electr., Tohoku Gakuin Univ., Tagajo, Japan
fDate :
9/1/1990 12:00:00 AM
Abstract :
A novel elliptical-cylinder-type shielding device for static magnetic fields is presented. This device consists of two domes using 25-μm thick METGLAS 2826-MB amorphous ribbons. Amorphous ribbons were attached to the legs of the domes in a U-shaped configuration. The U-shaped amorphous ribbons are magnetized by an external field, and a demagnetizing field was set up to cancel the external field. Shielding effectiveness can be controlled easily by adjusting the length of the U-shaped amorphous ribbons and the distance between the apexes of the domes. A shielding factor defined as external field intensity/internal field intensity becomes higher than 103 when the demagnetizing field of the U-shaped amorphous ribbon completely cancels the external field
Keywords :
demagnetisation; magnetic properties of amorphous substances; magnetic shielding; magnetisation; metallic glasses; 25 micron; METGLAS 2826-MB amorphous ribbons; U-shaped amorphous ribbons; demagnetizing field; elliptical-cylinder-type shielding device; external field intensity; internal field intensity; shielding factor; static magnetic fields; Amorphous magnetic materials; Amorphous materials; Demagnetization; Eddy currents; Humans; Magnetic field measurement; Magnetic materials; Magnetic shielding; Magnetization; Magnetostatics;
Journal_Title :
Magnetics, IEEE Transactions on
