| 有机物包裹的Fe3O4颗粒表面自旋钉扎效应研究 |
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| 引用本文： | 陆怀先,都有为,王挺祥,张毓昌. 有机物包裹的Fe3O4颗粒表面自旋钉扎效应研究[J]. 物理学报, 1985, 34(1): 121-125 |
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| 作者姓名： | 陆怀先 都有为 王挺祥 张毓昌 |
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| 作者单位： | (1)南京大学固体物理研究所; (2)南京大学物理系 |
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| 摘 要： | 测量了80?的Fe3O4颗粒和三种不同有机物包裹后的M?ssbauer谱;不同有机物包裹后M?ssbauer谱表现出不同程度的弥散,施加8kOe外磁场以后,所有样品的超顺磁谱均消失,并呈现六线谱。可以用有机物对Fe3O4表面Fe离子自旋产生钉扎作用来解释这些实验事实;从施加磁场前后M?ssbauer谱的变化对钉扎作用的深度进行了估算。关键词：
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| 收稿时间： | 1983-12-14 |
INVESTIGATION ON SPIN PINNING EFFECT OF THE MAGNETITE PARTICLE SURFACE COATED WITH ORGANISM |
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| LU HUAI-XIAN,DU YOU-WEI,WANG TING-XIANG and ZHANG YU-CHANG. INVESTIGATION ON SPIN PINNING EFFECT OF THE MAGNETITE PARTICLE SURFACE COATED WITH ORGANISM[J]. Acta Physica Sinica, 1985, 34(1): 121-125 |
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| Authors: | LU HUAI-XIAN DU YOU-WEI WANG TING-XIANG ZHANG YU-CHANG |
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| Abstract: | The M?ssbauer spectra of 80 ? magnetite particles before and after coating with the three different organic surfactants were measured. The M?ssbauer spectra after coating appear as dispersion to a different degree with the different organism. When magnetic field (8 kOe) was applied, the superparamagnetic spectra for all sample disappeared and the spectra appeared as sextets. The experimental results showed that the organism produce pinning of the spin of the iron ions on the magnetite particle surface. The depth of pinning with and without applied magnetic field were calculated.
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