Title :
Application of Fe-based nanocrystalline ribbon as a noise filter
Author :
Ishii, Osamu ; Miyaguchi, Yuusuke ; Kambe, Shiro
Author_Institution :
Yamagata Univ., Yonezawa, Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
The paper describes the application of Fe-based nanocrystalline ribbon to a common-mode noise filter in the 1 MHz~1 GHz frequency range. A 10 μm thick Fe-based amorphous ribbon was converted into an Fe-based nanocrystalline ribbon by annealing it at 550°C for 10 min. The ribbon exhibited high permeability and high impedance characteristics when it was annealed in a transverse magnetic field. The resistance of a 5 mm diameter roll of Fe-nanocrystalline ribbon (12.5 mm wide and 6 cm long) increased from 3 Ω at 1 MHz to 10 Ω at 1 GHz. We confirmed that this filter exhibited the same noise attenuation as a conventional filter (ferrite core) but with 1/33rd its volume
Keywords :
UHF filters; VHF filters; electric impedance; electromagnetic interference; ferromagnetic materials; interference suppression; iron compounds; magnetic permeability; nanostructured materials; passive filters; radiofrequency filters; 1 MHz to 1 GHz; 10 micron; 10 min; 3 to 10 ohm; 550 C; Fe-based nanocrystalline ribbon; amorphous ribbon annealing; common-mode noise filter; high impedance characteristics; high permeability characteristics; transverse magnetic field annealing; Amorphous materials; Annealing; Attenuation; Filters; Frequency; Impedance; Magnetic fields; Magnetic noise; Magnetic separation; Permeability;
Journal_Title :
Magnetics, IEEE Transactions on
