采用磁控溅射方法在室温衬底上制备了Co30Ag70(原子百分比)颗粒膜.利用X射线衍射谱(XRD)和四探针方法研究了Co30Ag70颗粒膜沉积态及真空退火后的室温结构和室温巨磁电阻效应.结果表明:沉积态颗粒膜织构较明显,巨磁电阻效应呈现各向异性;随着退火温度的升高,Co30Ag70颗粒膜的微结构发生了演变,导致Co30Ag70颗粒膜的巨磁电阻效应呈现先降后升再降的现象,在473K达到最大值,其值约为-5.7%.
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