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研究了非晶Co70Fe4.5Ni4Nb1Si12.5B8合金薄带的巨磁阻抗效应.实验表明，在一定频率范围内提高测试频率，磁阻抗效应有明显提高；适当温度的退火也有助于磁阻抗效应的提高.制备态非晶合金样品在频率为5MHz下达120%左右，经过退火处理的非晶样品5MHz下的效应可达400%左右.The giant magneto-impedance (GMI) effects in amorphous Co70Fe4.5Ni4Nb1Si12.5B8 alloy ribbon have been observed. It is shown that the GMI effects increase with driving current frequency and an appropriate annealing can enhance the effect. A large MI ratio of about 120% in the as-cast sample and a ratio of about 400% in a suitably annealed sample have been measured at 5MHz.
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中国物理学会期刊
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