中文摘要：

研究了薄带宽度对（Fe0.9Co0.1）76.9Cu0.6Nb2.5Si11B9非晶合金薄带阻抗效应的影响。样品长度为40mm,宽度分别为8和4.4mm。淬态下4.4mm宽的样品在f=3.75MHz的条件下达到最大值28%,而8mm宽的样品在f=4.34MHz的条件下达到最大值17%;各频率下4.4mm宽的样品的阻抗效应均〉8mm宽的样品。（Fe0.9Co0.1）76.9Cu0.6Nb2.5Si11B9非晶合金薄带阻抗效应远大于Co68Fe5Si12B15非晶合金阻抗效应。

英文摘要：

The effect of width on magneto-impedance（MI）of（Fe0.9Co0.1）76.9Cu0.6Nb2.5Si11B9 amorphous ribbons was studied.The ribbons used for the MI measurements were 40mm long,8mm and 4.4mm wide respectively.The as cast 4.4-mm-wide ribbons exhibit a larger MI compared with the 8-mm-wide ribbons,at all frequencies.The MI attains a maximum value of 28% for 4.4mm-wide ribbon at 3.75MHz,and 17% for 8mm-wide ribbons at 4.34MHz.The maximum MI of（Fe0.9Co0.1）76.9Cu0.6Nb2.5Si11B9 amorphous ribbons is much higher than Co38Fe5Si12B15 amorphous ribbons.