摘要
The giant magneto-impedance(GMI)effect has been investigated in sandwiched FeCuCrVSiB films annealed at 300℃ for 1.5 h.The frequency and field dependences of the GMI have been observed in the frequency range from 50 kHz to 13 MHz.The GMI ratio increases at first with increasing frequency,and reaches its maximum value of 136%at a very low characteristic frequency of about 4 MHz,and then decreases with further increasing frequency.These superior properties are related to the special structure of the sandwiched films.
基金
Supported by the National Natural Science Foundation of China under Grant No.59981004
the Doctoral Training Foundation of the National Education Commission under Grant No.9704225.
