高周波大振幅励磁における軟磁性薄膜のパーミアンス

抄録

We measured the permeance of Cu-Mo-Ni-Fe film and Co-Zr-Nb film up to 5 Oe and up to 10 MHz along the hard and easy axes of magnetization, using the figure-of-eight coil method, with a new three-turn separated type of Helmholtz coil. The permeance of Cu-Mo-Ni-Fe film and Co-ZrNb film along the hard axis of magnetization changed when the amplitude of the magnetic field exceeded the anisotropy field of each film. The permeance along the easy axis of magnetization depended on the kind of film. The perrneance of Cu-Mo-Ni-Fe film along the easy axis of magnetization changed when the amplitude of the magnetic field exceeded the corresponding ac coercive force.