Title :
High temperature magnetic properties of Fe-Cu-Nb-Si-B cores with creep-induced anisotropy
Author :
Yanai, Takeshi ; Yamasaki, Masakazu ; Takahashi, Ken-ichiro ; Nakano, Masaki ; Yoshizawa, Yoshihito ; Fukunaga, Hirotoshi
Author_Institution :
Dept. of Electr. Eng. & Electron., Nagasaki Univ., Japan
fDate :
7/1/2004 12:00:00 AM
Abstract :
Fe-Cu-Nb-Si-B ribbons with creep-induced anisotropy fabricated by continuous stress-annealing were formed into toroidal cores. The temperature dependence of their magnetic loss and relative permeability at Bm=0.1 T was evaluated in the frequency range of 0.5-1 MHz and temperature range from room temperature to 523 K. We found that the cores can be used up to 523 K without magnetic property deterioration. This suggests that the proposed cores have superior high temperature properties compared with conventional gapped-ferrite cores allowing use at high temperature.
Keywords :
boron alloys; copper alloys; induced anisotropy (magnetic); iron alloys; magnetic annealing; magnetic cores; niobium alloys; permeability; silicon alloys; 0.5 to 1 MHz; 293.15 to 523 K; Fe-Cu-Nb-Si-B; Fe-Cu-Nb-Si-B cores; Fe-Cu-Nb-Si-B ribbons; continuous stress-annealing; creep-induced anisotropy; gapped-ferrite cores; high temperature magnetic properties; low permeability; magnetic core; magnetic loss; nanocrystalline; relative permeability; temperature dependence; toroidal cores; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic cores; Magnetic losses; Magnetic properties; Permeability; Perpendicular magnetic anisotropy; Temperature dependence; Temperature distribution; Toroidal magnetic fields; Continuous stress-annealing; creep-induced anisotropy; high temperature properties; low permeability; magnetic core; nanocrystalline;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.829188
