| 包钴铁氧体矫顽力增大机制的探讨 |
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| 引用本文： | 都有为,陆怀先,王挺祥,薛荣华,陈亮,胡洪铨. 包钴铁氧体矫顽力增大机制的探讨[J]. 物理学报, 1986, 35(9): 1223-1226 |
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| 作者姓名： | 都有为 陆怀先 王挺祥 薛荣华 陈亮 胡洪铨 |
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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： | 化学共沉淀工艺制备Zn0.2Fe2.8O4铁氧体颗粒,颗粒尺寸约300埃,近似呈球状,在其表面外延生长一层钴铁氧体层。测量了矫顽力、铁磁共振线宽随钴含量的变化,得到由于外延层引起的磁各向异性常数Ku约为5×105尔格/厘米3。由实验结果分析,主要是Zn0.2Fe2.8O4颗粒表面与外延生长层相当于两个氧离子层厚所产生的相互作用。关键词：
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| 收稿时间： | 1985-10-12 |
MECHANISM OF HIGHLY COERCIVITY ON EPITAXIAL Co-FERRITES |
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| Du You-wei,Lu Huai-xian,Wang Ting-xiang,Xue Rong-hu,Cheng Liang and Hu Hong-quan. MECHANISM OF HIGHLY COERCIVITY ON EPITAXIAL Co-FERRITES[J]. Acta Physica Sinica, 1986, 35(9): 1223-1226 |
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| Authors: | Du You-wei Lu Huai-xian Wang Ting-xiang Xue Rong-hu Cheng Liang Hu Hong-quan |
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| Abstract: | The particles of Zn0.2Fe2.8O4, ferrite are prepared by chemical Co-precipitation. The shape of particles are nearly spherical and their mean diameter is about 300?. Epitaxial cobalt ferrite layer is coated on their surface. Coercivity Hc and ferromagnetic resonance line width △H are measured. According to, experimental results, the effective mangnetic anisotropy constant Ku is about 5×105 erg/cm2. That is induced by interface interaction between the inner core of Zn0.2Fe2.8O4 and Co-Fe epitaxial layer. The distance of interaction is about the total thickness of two oxygen ion layers.
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