Abstract
CoFeSiB system soft magnetic amorphous fiber of about 10μm diameter as drawn (AMFD) has a unique B-H loop at the MHz region. We clarified that if the AMFD core is used at about 1 kGauss at 1 MHz, the core loss is extremely low (1.7 J/m3), although the permeability is small (200).
We designed and fabricated a magnetic head to use in the AMFD core for magneto-optic recording by magnetic field modulation with an AMFD center core 1 mm in diameter.
Comparison of the AMFD core head and a conventional Ferrite head shows that the loss of the former is about 60% of the latter under the same conditions of magnetic field and inductance.
