Zero Magnetostriction and Extremely Low Residual Magnetic Loss in Fe-Co Amorphous Ribbons
The initial permeability μ_i, the loss factor tan δ, and the inverse quality factor tan δ/μ_i of Fe_5Co_<70>Si_<15>B_<10> ribbons 35 μm, 30 μm, 25 μm and 21 μm in thickness were measured with a Maxwell Bridge from room temperature to 140℃ in the high-frequency region from 3 kHz to 500 kHz. The initial permeability of the ribbon 21 μm in thickness was about 10, 600 at 3 kHz and 4300 at 500 kHz. The residual loss coefficient C_1 and the hysteresis loss coefficient h_1 were extremely low, about 8×10^<-3> and 60 (cm/A), respectively. In the high-frequency region, the eddy current loss term increases with the square of the thickness of the ribbons and plays the most important part of all the magnetic losses.
- Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy 26 291-291, 1976