| 退火对Co35(SiO2)65颗粒膜巨磁电阻效应的影响 |
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| 引用本文： | 徐庆宇,倪 刚,桑 海,都有为.退火对Co35(SiO2)65颗粒膜巨磁电阻效应的影响[J].物理学报,1999,48(13):52-55. |
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| 作者姓名： | 徐庆宇 倪 刚 桑 海 都有为 |
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| 作者单位： | 南京大学固体微结构物理国家重点实验室，南京 210093 |
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| 基金项目： | 国家自然科学基金(批准号：19890310(4))、国家攀登计划(纳米材料科学)(批准号：NMS-07)和江苏省自然科学基金(批准号：BK97039)资助的课题. |
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| 摘 要： | 采用多靶离子束溅射镀膜机制备了一系列不同退火温度的Co35(SiO2)65（体积百分数）颗粒膜样品，发现样品的巨磁电阻效应随着退火温度Ta的升高而单调下降.应用磁力显微镜对样品的磁结构进行了观测，发现随着退火温度的升高，近邻的Co颗粒的磁矩倾向于平行排列，形成磁畴结构，从而导致Co35(SiO2)65颗粒膜巨磁电阻效应单调下降.
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| 收稿时间： | 1999-06-10 |
Influence of Annealing Temperature on the Giant Magnetoresistance of Co35(SiO2)65 Nano-Granular Films |
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| Xu Qing-Yu,Ni Gang,Sang Hai and Du You-Wei.Influence of Annealing Temperature on the Giant Magnetoresistance of Co35(SiO2)65 Nano-Granular Films[J].Acta Physica Sinica,1999,48(13):52-55. |
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| Authors: | Xu Qing-Yu Ni Gang Sang Hai and Du You-Wei |
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| Abstract: | A series of Co35(SiO2)65 (volume fraction) nano-granular films of heat treatment at different annealing temperatures (Ta) were fabricated using ion-beam sputtering technique. The giant magnetoresistance of the samples was found to decrease with increasing annealing temperature. It was found that with increasing annealing temperature to 500K, the magnetic domains of Co35(SiO2)65 nano-granular films were more and more clear, which showed that with increasing annealing temperature, the neighboring isolated Co particles tended to arrange their magnetic moments parallel to each other, thus led to the decrease of the giant magnetoresistance of Co35(SiO2)65 nano-granular films with increasing annealing temperature. |
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