| 超细Fe微粒表面氧化层的磁性研究 |
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| 引用本文： | 吴坚,陆怀先,都有为,高学奎,王挺祥. 超细Fe微粒表面氧化层的磁性研究[J]. 物理学报, 1988, 37(12): 2044-2047 |
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| 作者姓名： | 吴坚 陆怀先 都有为 高学奎 王挺祥 |
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| 作者单位： | 南京大学固体微结构实验室物理系 |
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| 摘 要： | 测量了超细Fe微粒比饱和磁化强度σs与平均粒径d的关系,发现σs随d的减小而减小;还测量了升温和降温过程中的σ(T),发现σ(T)随T的变化是不可逆的,且始终存在着σr(T)<σd(T)。上述现象是由于超细Fe微粒的表面覆盖着氧化层,氧化层内存在着自旋钉扎现象所致。关键词：
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| 收稿时间： | 1988-02-28 |
A STUDY ON THE MAGNETIC PROPERTIES OF SURFACE OXIDE LAYERS OF ULTRAFINE IRON PARTICLES |
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| WU JIAN,LU HUAl-XIAN,DU YOU-WEI,GAO XUE-KUI and WANG TING-XIANG. A STUDY ON THE MAGNETIC PROPERTIES OF SURFACE OXIDE LAYERS OF ULTRAFINE IRON PARTICLES[J]. Acta Physica Sinica, 1988, 37(12): 2044-2047 |
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| Authors: | WU JIAN LU HUAl-XIAN DU YOU-WEI GAO XUE-KUI WANG TING-XIANG |
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| Abstract: | The dependence of σs of ultrafine iron particles on their average diameter d is measured. It is found that the smaller the particles, the smaller their σs. The variation of σ with temperature, σ(T), which is irreversible, is also measured both in temperature rising and dropping processes. The experimental results can be explained by spin pinning in the oxide layers. |
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