The CoFeB zero-magnetostrictive amorphous film samples for investigation of the magnetoimpedance (MI) effect were prepared by RF sputtering. The film was etched to form a strip pattern having 1-4μmthickness, 300mu;m width and 10mm length. The relation between annealing conditions and MI characteristics was investigated for those films. Impedance Z monotonically decreases with increasing applied field Hex when a high frequency sinusoidal current was applied to the sample annealed in a rotating field. In case of the sample having transverse anisotropy, Z sharply increases with Hex for the region Hex
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Uchiyama et al. (1995) studied this question.
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