| 介观结构对纳米晶软磁合金巨磁阻抗效应影响的理论分析 |
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| 引用本文： | 杨全民,王玲玲,孙德成.介观结构对纳米晶软磁合金巨磁阻抗效应影响的理论分析[J].物理学报,2005,54(12):5730-5737. |
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| 作者姓名： | 杨全民 王玲玲 孙德成 |
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| 作者单位： | (1)湖南大学应用物理系，长沙 410082; (2)连云港师范高等专科学校化学系，连云港 222006; (3)连云港师范高等专科学校物理系，连云港 222006 |
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| 基金项目： | 国家自然科学基金(批准号：19874018)、江苏省现代教育技术研究重点项目(批准号：2005-R-71)和江苏省连云港市工业研究开发计划(批准号：GY200403)资助的课题. |
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| 摘 要： | 根据用原子力显微镜对Fe基纳米晶Fe73.5Cu1Nb3Si13.5B9合金薄带的介观结构和巨磁阻抗效应的实验研究结果，提出了纳米晶软磁合金巨磁阻抗效应受其介观结构影响的理论模型.该模型成功地解释了低频对纳米晶软磁合金巨磁阻抗效应的影响，反映了现有“三明治”理论的主要特征，并弥补了它的不足；同时指出了纳米晶粒电导率σ、磁导率μ对合金巨磁阻抗效应有影响.
关键词：
铁基纳米晶合金
介观结构
巨磁阻抗效应
介观模型
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| 关 键 词： | 铁基纳米晶合金 介观结构 巨磁阻抗效应 介观模型 |
| 文章编号： | 1000-3290/2005/54（12）/5730-08 |
| 收稿时间： | 03 10 2005 12:00AM |
| 修稿时间： | 2005-03-102005-07-15 |
Theoretical study on the influence of the microstructure of Fe73.5Cu1Nb3Si13.5B9 on its giant magneto-impedance effect |
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| Yang Quan-Min,Wang Ling-Ling,Sun De-Cheng.Theoretical study on the influence of the microstructure of Fe73.5Cu1Nb3Si13.5B9 on its giant magneto-impedance effect[J].Acta Physica Sinica,2005,54(12):5730-5737. |
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| Authors: | Yang Quan-Min Wang Ling-Ling Sun De-Cheng |
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| Institution: | 1. Department of Physics, Lianyungang Teachers College, Lianyungang 222006, China; 2. Department of Applied Physics, Hunan University, Changsha 410082, China; 3.Department of Chemistry, Lianyungang Teachers College, Lianyungang 222006,China |
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| Abstract: | Based on the experimental results of atomic force microscope observation of the microstructure and the giant magneto-impedance (GMI) effect of Fe73.5Cu1Nb3Si13.5B9 nanocrystalline alloy, we propose a model for exploring the influence of the microstructure on the GMI effect in this kind of Fe-based nanocrystalline soft magntic alloy which explains successfully the GMI behavior at low frequency. The model possesses the main features of the sandwiched model while eliminating its deficiencies. This model is called the mesoscopic model. We also point out the influence of the electrical conductivity σ and the permeability μ of nanocrystal grains on the GMI effect of the Fe-based nanocrystalline alloys. |
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| Keywords: | Fe-based nanocrystalline alloys microstructure giant magneto-impedance effect mesoscopic model |
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