研究了外层为NiFe层,里层为Ag丝的复合结构材料的巨磁阻抗效应,发现复合丝在较低频率下就有较大的阻抗变化值.同时推导了外场小于各向异性场时具有圆周各向异性的复合丝的阻抗表达式,并讨论了各结构参量对巨磁阻抗效应的影响.发现材料的巨磁阻抗效应强烈依赖于复合丝铁磁层的厚度;而导体层和铁磁层的电导率相差越多则材料的巨磁阻抗效应也越大.
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