| 不同衬底温度下制备的Co-Al-O介质颗粒薄膜的巨磁电阻效应 |
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| 引用本文： | 张振刚 黎超. 不同衬底温度下制备的Co-Al-O介质颗粒薄膜的巨磁电阻效应[J]. 兰州大学学报(自然科学版), 1999, 35(1): 57-61 |
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| 作者姓名： | 张振刚 黎超 |
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| 作者单位： | 兰州大学物理学系 |
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| 摘 要： | 利用射频反应溅射的方法在不同衬底温度（Ｔｓ）下制备了Ｃｏ－Ａｌ－Ｏ介质颗粒薄膜。薄膜的本征电阻及磁电阻值密切依赖于薄膜制备过程中的衬底温度。通过原子力显微镜对样品表面的观察发现：以Ｃｏ为基的纳米磁性颗粒的尺寸随Ｔｓ的增加而变大，并且颗粒之间由完全初介质分离逐渐变化到互相连接．对应这种结构上的变化，薄膜的电导机制由隧道效应向金属性电导转变，相应地薄膜的磁电阻值也发生了变化。
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| 关 键 词： | 薄膜 巨磁电阻效应 介质颗粒薄膜 纳米磁性颗粒 |
Giant Magnetoresistance of Co Al O Insulating Granular Films Deposited at Various Substrate Temperature |
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| Zhang Zhengang,Li Chao,Li Chengxian,Zhang Shibin,Ge Shihui. Giant Magnetoresistance of Co Al O Insulating Granular Films Deposited at Various Substrate Temperature[J]. Journal of Lanzhou University(Natural Science), 1999, 35(1): 57-61 |
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| Authors: | Zhang Zhengang Li Chao Li Chengxian Zhang Shibin Ge Shihui |
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| Abstract: | The tunnel type insulating granular films of Co Al O were prepared by rf reactive sputtering at various substrate temperatures ( T s ). Both resistivity and magnetoresistance were found to be closely dependent on T s . On the around that the Co rich granular size increased with T s , a simple model was given to elucidate the observed electrical and magnetic resistance variance with T s . |
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| Keywords: | Co Al O insulating granular film giant magnetoresistance tunneling effect microstructure |
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