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采用射频共溅射方法制备了不同金属体积分数fυ的Fe-SiO2颗粒膜，利用X射线衍 射、透射电镜、Mǒssbauer效应和振动样品磁强计详细研究了薄膜的结构、磁性及磁电阻效 应。结果表明：fυ为0.33时，得到磁电阻最大值-3.3 ％。Fe0．33(SiO2)0．67样品在室 温下表现出超顺磁性，对该样品的变温Mǒssbauer谱研究表明：颗粒的尺寸分布满足对数正 态分布。探讨了TMP与Fe的依赖关系。
The Fe-SiO2 films with different metal volume fractions were prepared by RF co-sputtering. The structure, magnetism and magnetoresistance of the films were investigated in detail by X-ray diffraction, transmission electron microscopy, Mossssauer effect and vibrating sample magnetometer. The results show that: when fυ is 0.33, the maximum value of magnetoresistance is -3.3%. The Fe0.33 (SiO2) 0.67 sample shows superparamagnetism at room temperature. The temperature-dependent Mǒssbauer spectrum of the sample shows that the particle size distribution satisfies the logarithm normal distribution. The dependence of TMP on Fe was discussed.